A. B. C. D. E. A - WordPress.com B. 192.168.10 C. 0.0.0.5 D. 51 E. None of the above Answer &...

1. How many digits of the DNIC (Data Network Identification Code) identify the country?

A. first three

B. first four

C. first five

D. first six

E. None of the above

Answer & Explanation

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

View Answer Workspace Report Discuss in Forum

2. A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being

used?

A. hot potato routing

B. flooding

C. static routing

D. delta routing



Answer: Option A

Explanation:



3. The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3.

If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately

equal to

A. 0.003

B. 0.009

C. 0.991

http://www.indiabix.com/computer-science/networking/discussion-220




D. 0.999



Answer: Option B

Explanation:



4. Frames from one LAN can be transmitted to another LAN via the device

A. Router B. Bridge

C. Repeater D. Modem


Answer: Option B

Explanation:



5. Which of the following condition is used to transmit two packets over a medium at the same time?

A. Contention

B. Collision

C. Synchronous

D. Asynchronous



6. You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You

would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?

A. 255.240.0.0 B. 255.248.0.0

C. 255.252.0.0 D. 255.254.0.0

E. 255.255.255.255


Answer: Option D





Explanation:



7. What are the most commonly used transmission speeds in BPS used in data communication?

A. 300

B. 1200

C. 2400

D. 9600



Answer: Option D

Explanation:



8. What is the default subnet mask for a class C network?

A. 127.0.0.1

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.0



Answer: Option D

Explanation:



9. Which of the following is used for modulation and demodulation?

A. modem







B. protocols

C. gateway

D. multiplexer



Answer: Option A

Explanation:



10. Which of the following is not a disadvantage of wireless LAN?

A. Slower data transmission

B. higher error rate

C. interference of transmissions from different computers

D. All of the above


Answer: Option D

Explanation:


Answer: Option B

Explanation:


11. The Internet Control Message Protocol (ICMP)

A. allows gateways to send error a control messages to other gateways or hosts

B.

provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software

on another

C.

reports error conditions to the original source, the source must relate errors to individual application programs and

take action to correct the problem

D. All of the above







Answer: Option D

Explanation:



12. Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable

everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the

most correct answer.

A. Modem B. Cable

C. Hub D. Router


Answer: Option D

Explanation:



13. The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full

duplex data transmission, both the sender and the receiver

A. cannot talk at once

B. can receive and send data simultaneously

C. can send or receive data one at a time

D. can do one way data transmission only



Answer: Option B

Explanation:



14. How many hosts are attached to each of the local area networks at your site?

A. 128







B. 254

C. 256

D. 64



Answer: Option B

Explanation:



15. Which of the following technique is used for fragment?

A. a technique used in best-effort delivery systems to avoid endlessly looping packets

B.

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and

places it in the data portion of the low level frame

C.

one of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission

across a network that cannot handle the original datagram size

D. All of the above



Answer: Option C

Explanation:


16. Contention is

A. One or more conductors that serve as a common connection for a related group of devices

B. a continuous frequency capable of being modulated or impressed with a second signal

C. the condition when two or more stations attempt to use the same channel at the same time

D.

a collection of interconnected functional units that provides a data communications service among stations attached

to the network






Answer: Option C

Explanation:



17. Avalanche photodiode receivers can detect hits of transmitted data by receiving

A. 100 photons

B. 200 photons

C. 300 photons

D. 400 photons



Answer: Option B

Explanation:



18. Satellite-Switched Time-Division Multiple Access (SS/TDMA) is

A. the method of determining which device has access to the transmission medium at any time.

B. a medium access control technique for multiple access transmission media

C. a form of TDMA in which circuit switching is used to dynamically change the channel assignments

D. All of the above



Answer: Option C

Explanation:



19. When you ping the loopback address, a packet is sent where?







A. On the network

B. Down through the layers of the IP architecture and then up the layers again

C. Across the wire

D. through the loopback dongle



Answer: Option B

Explanation:



20. Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?

A. FTP

B. SNMP

C. SMTP

D. RPC



Answer: Option C

Explanation:


21. Which of the following device is used to connect two systems, especially if the systems use different protocols?

A. hub

B. bridge

C. gateway

D. repeater



Answer: Option C




Explanation:



22. The synchronous modems are more costly than the asynchronous modems because

A. they produce large volume of data

B. they contain clock recovery circuits

C. they transmit the data with stop and start bits.

D. they operate with a larger bandwidth



Answer: Option B

Explanation:



23. A distributed network configuration in which all data/information pass through a central computer is

A. bus network

B. star network

C. ring network

D. Point-to-point network



Answer: Option B

Explanation:



24. Which of the following TCP/IP protocol allows an application program on one machine to send a datagram to an application

program on another machine?

A. UDP







B. VMTP

C. X.25

D. SMTP



Answer: Option A

Explanation:



25. A remote batch-processing operation in which data is solely input to a central computer would require a:

A. telegraph line

B. simplex lines

C. mixedband channel

D. All the above



Answer: Option B

Explanation:


26. ICMP (Internet Control Message Protocol) is

A. a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address

B. a TCP/IP high level protocol for transferring files from one machine to another

C. a protocol used to monitor computers

D. a protocol that handles error and control messages



Answer: Option D

Explanation:






27. If you get both local and remote echoes, every character you type will appear on the screen

A. once

B. twice

C. three times

D. never



Answer: Option B

Explanation:



28. What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?

A. 192

B. 192.168.10

C. 0.0.0.5

D. 51



Answer: Option B

Explanation:



29. The slowest transmission speeds are those of

A. twisted-pair wire

B. coaxial cable







C. fiber-optic cable

D. microwaves


Answer: Option A

Explanation:



30. A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?

A. 3 Kbps

B. 6 Kbps

C. 12 Kbps

D. 24 Kbps.


Answer: Option B

Explanation:


31. Carrier is

A. One or more conductors that serve as a common connection for a related group of devices


C. the condition when two or more sections attempt to use the same channel at the same time

D.

a collection of interconnected functional units that provides a data communications service among stations attached

to the network



Answer: Option B

Explanation:



32. What can greatly reduce TCP/IP configuration problems?






A. WINS Server

B. WINS Proxy

C. DHCP Server

D. PDC



Answer: Option C

Explanation:



33. In CRC there is no error if the remainder at the receiver is _____.

A. equal to the remainder at the sender

B. zero

C. nonzero

D. the quotient at the sender


Answer: Option B

Explanation:



34. Which of the following statements is correct for the use of packet switching?

A.

the subdivision of information into individually addressed packets in conjunction with alternative routing

arrangement enabled the transmission path to be altered in the event of congestion or individual link failure

B.

the employment of additional intelligence within the network enabled more sophisticated error control and link

control procedures to be applied

C.

by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of

capacity could be achieved.

D. All of the above







Answer: Option D

Explanation:



35. A front-end processor is

A. a user computer system

B. a processor in a large-scale computer that executes operating system instructions

C. a minicomputer that relieves main-frame computers at a computer centre of communications control functions

D. preliminary processor of batch jobs.



Answer: Option C

Explanation:


36. What is the port number for NNTP?

A. 119 B. 80

C. 79 D. 70


Answer: Option A

Explanation:



37. Eight stations are competing for the use of a shared channel using the 'Adaptive tree Walk Protocol'. If the stations 7 and 8 are

suddenly become ready at once, how many bit slots are needed to resolve the contention?

A. 7 slots

B. 5 slots

C. 10 slots






D. 14 slots


Answer: Option A

Explanation:



38. Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?

A. 10

B. 12

C. 120

D. 1200



Answer: Option C

Explanation:



39. To connect a computer with a device in the same room, you might be likely to use

A. a coaxial cable

B. a dedicated line

C. a ground station

D. All of the above



Answer: Option A

Explanation:








40. Internet-like networks within an enterprise.

A. Intranets

B. Switching alternating

C. Inter organizational networks

D. Extranets


Answer: Option A

Explanation:


41. How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communications with the

host?

A. 16 - bits

B. 32 - bits

C. 48 - bits

D. 64 - bits



Answer: Option B

Explanation:



42. With an IP address of 100, you currently have 80 subnets. What subnet mask should you use to maximize the number of

available hosts?

A. 192 B. 224

C. 240 D. 248

E. 252


Answer: Option E





Explanation:



43. Which of the following types of channels moves data relatively slowly?

A. wideband channel

B. voiceband channel

C. narrowband channel

D. broadband channel



Answer: Option C

Explanation:



44. Which of the following is required to communicate between two computers?

A. communications software

B. protocol

C. communications hardware

D. access to transmission medium

E. All of the above


Answer: Option E

Explanation:



45. Which of the following does not allow multiple users or devices to share one communications line?

A. doubleplexer







B. multipplexer

C. concentrator

D. controller



Answer: Option A

Explanation:


46. The geostationary satellite used for communication systems

A. rotates with the earth

B. remains stationary relative to the earth

C. is positioned over equator

D. All of the above



Answer: Option D

Explanation:



47. Telecommunication networks frequently interconnect an organization with its customers and suppliers. Select the best fit for

answer:

A. Bandwidth alternatives



D. Extranets


Answer: Option C

Explanation:






48. The packets switching concept was first proposed

A. in the late 1980s for the Defense Ministry of US.

B. in the early 1960s for military communication systems, mainly to handle speech

C. in the late 1950s for Defense Ministry of US

D. All of the above



Answer: Option B

Explanation:



49. The _____ houses the switches in token ring.

A. transceiver

B. nine-pin connector

C. MAU

D. NIC



Answer: Option C

Explanation:



50. What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

A. Switch B. Bridge

C. Gateway D. Router








Answer: Option B

Explanation:


1. Which of the following refers to the terms "residual error rate"?

A. the number of bit errors per twenty four hours of continuous operation on an asynchronous line

B. The probability that one or more errors will be undetected when an error detection scheme is used

C. the probability that one or more errors will be detected when an error detection mechanism is used

D. signal to noise ratio divided by the ratio of energy per bit to noise per hertz



Answer: Option B

Explanation:



2. Which of the following summation operations is performed on the bits to check an error-detecting code?

A. Codec B. Coder-decoder

C. Checksum D. Attenuation


Answer: Option C

Explanation:



3. The research and development department at your office has been experimenting with different technologies to help improve

the performance of the network. One group has been examining the use of a broadband network versus a based band network.

Select the correct statement about broadband and baseband.

A.

Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry

one channel

B.

Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on

a single cable

C. Baseband refers to local area networks, and broadband refers to wide area networks.






D. Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed

E.

Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in

certain conditions


Answer: Option B

Explanation:



4. An error-detecting code inserted as a field in a block of data to be transmitted is known as

A. Frame check sequence

B. Error detecting code

C. Checksum

D. flow control



Answer: Option A

Explanation:



5. The cheapest modems can transmit

A. 300 bits per second

B. 1,200 bits per second

C. 2,400 bits per second

D. 4,800 bits per second



Answer: Option A

Explanation:






6. Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas

telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the

start of a long distance transmission?

A. Interface

B. Modem

C. Attenuation

D. Teleprocessor



Answer: Option B

Explanation:



7. What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?

A. 16

B. 9

C. 8

D. 4



Answer: Option B

Explanation:



8. The receive equalizer reduces delay distortions using a

A. tapped delay lines

B. gearshift

C. descrambler






D. difference engine



Answer: Option A

Explanation:



9. Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a

medium speed line or a low speed line. Find the total number of topologies.

A. 12 B. 81

C. 48 D. 729


Answer: Option D

Explanation:



10. A network consists of eight NT servers. You are planning to move servers to different segments of your network, what utility

should be used at each server to determine which server generates the most traffic?

A. NBTSTAT

B. NETSTAT.EXE

C. Performance Monitor

D. Network Monitor

E. ARP.EXE


Answer: Option D

Explanation:


11. Sending a file from your personal computer's primary memory or disk to another computer is called

A. uploading






B. downloading

C. logging on

D. hang on



Answer: Option A

Explanation:



12. What is the name of the software package that allows people to send electronic mail along a network of computers and

workstations?

A. Memory resident package

B. Project management package

C. Data communication package

D. Electronic mail package



Answer: Option C

Explanation:



13. The communication mode that supports two-way traffic but only one direction at a time is

A. simplex

B. duplex

C. half duplex

D. multiplex







Answer: Option C

Explanation:



14. HMP (Host Monitoring Protocol) is:


B. a TCP/IP high level protocol for transferring files from one machine to another.





Answer: Option C

Explanation:



15. Which of the following is a voiceband channel?

A. Telephone line

B. Telegraph line

C. Coaxial cable

D. Microwave systems



Answer: Option A

Explanation:


16. A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible)

that can be sent on this ring?

A. 8000 B frame






B. 80,000 B frame

C. 8 x 105 bit frame

D. 10,000 B frame


Answer: Option D

Explanation:

At 8 Mbps, a station can transmit 80,000 bits or 10,000 bytes in 10 msec. This is an upper bound on frame length. From this

amount, some overhead must be subtracted, giving a slightly lower limit for the data portion. Therefore, 10,000 B frame is the

correct answer.


17. Data are sent over pin _____ of the EIA-232 interface.

A. 2

B. 3

C. 4

D. All of the above


Answer: Option A

Explanation:



18. To connect a computer with a device in the same room, you might be likely to use

A. a coaxial cable

B. a dedicated line

C. a ground station

D. All of the above


Answer: Option A

Explanation:






19. Demodulation is a process of

A. converting analog to digital signals

B. converting digital to analog signals

C. multiplexing various signals into one high speed line signals

D. performing data description.


Answer: Option A

Explanation:



20. Internet-like networks between a company and its business partners. Select the best fit for answer:




D. Extranets


Answer: Option D

Explanation:


21. An example of an analog communication method is

A. laser beam

B. microwave

C. voice grade telephone line

D. All of the above








Answer: Option D

Explanation:



22. Which of the following layer protocols are responsible for user and the application programme support such as passwords,

resource sharing, file transfer and network management?

A. Layer 7 protocols

B. Layer 6 protocols

C. Layer 5 protocols

D. Layer 4 protocols



Answer: Option A

Explanation:



23. What frequency range is used for FM radio transmission?

A. Very Low Frequency : 3 kHz to 30. kHz

B. Low Frequency : 30 kHz to 300 kHz

C. High Frequency : 3 MHz to 30 MHz

D. Very High Frequency : 30 MHz to 300 MHz



Answer: Option D

Explanation:









24. Transmission of computerised data from one location to another is called

A. data transfer

B. data flow

C. data communication

D. data management



Answer: Option C

Explanation:



25. Compared to analog signals, digital signals

A. allow faster transmission

B. are more accurate

C. both (a) and (b)

D. All of the above



Answer: Option C

Explanation:


26. FDDI is a

A. ring network

B. star network

C. mesh network

D. bus based network






Answer: Option A

Explanation:



27. An anticipated result from multiprogramming operations is:

A. reduced computer idle time

B. the handling of more jobs

C. better scheduling of work

D. All of the above



Answer: Option D

Explanation:



28. A central computer surrounded by one or more satellite computers is called a

A. bus network

B. ring network

C. star network

D. All of the above



Answer: Option C

Explanation:



29. If delays are recorded as 10 bit numbers in a 50 router network, and delay vectors are exchanged twice a second, how much







bandwidth per fill duplex line is occupied by the distributed routing algorithm?

A. 500 bps

B. 1500 bps

C. 5 bps

D. 1000 bps


Answer: Option D

Explanation:



30. HOSTS file entries are limited to how many characters?

A. 8

B. 255

C. 500

D. Unlimited



Answer: Option B

Explanation:


31. Demodulation is the process of

A. converting digital signals to analog signals

B. converting analog signals to digital signals

C. combining many low speed channels into one high speed channel

D. dividing the high-speed signals into frequency bands



Answer: Option B




Explanation:



32. Which of the following statement is incorrect?

A.

The Addresses Resolution Protocol, ARP, allows a host to find the physical address of a target host on the same

physical network, given only the target IP address.

B.

The sender's IP - to- physical address binding is included in every ARP broadcast; receivers update the IP-to-

Physical address binding information in their cache before processing an ARP packet.

C.

ARP is a low-level protocol that hides the underlying network physical addressing, permitting us to assign IP-

addresses of our choice to every machine.

D. All of the above



Answer: Option D

Explanation:



33. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25

hosts and a maximum number of subnets?

A. 255.255.255.192 B. 255.255.255.224

C. 255.255.255.240 D. 255.255.255.248

E. 255.255.255.252


Answer: Option B

Explanation:



34. Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

A. 0.0.0.0, 0.0.0.1, 0.0.1.1

B. 255.255.255.0, 255.255.0.0, 255.0.0.0







C. 255.0.0.0, 255.255.0.0, 255.255.255.0

D. 255.255.0.0, 255.255.255.0, 255.255.255.255



Answer: Option C

Explanation:



35. Modulation is the process of

A. converting analog signals to digital signals

B. converting digital signals to analog signals

C. Multiplexing various signals into high speed line signals

D. performing data encryption.


Answer: Option B

Explanation:


36. Devices interconnected by the LAN should include

A. Computers and terminals

B. mass storage device, printers and plotters

C. bridges and gateways

D. All of the above



Answer: Option D

Explanation:








37. What are the data transmission channels available for carrying data from one location to another?

A. Narrowband

B. Voiceband

C. Broadband

D. All of the above



Answer: Option D

Explanation:



38. On a class B network, how many hosts are available at each site with a subnet mask of 248?

A. 16,382 B. 8,190

C. 4,094 D. 2,046

E. 1,022


Answer: Option D

Explanation:



39. Which of the following technique is used for encapsulation?

A. a technique used in best-effort delivery systems to avoid endlessly looping packets.

B.

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and

places it in the data portion of the low level frame.

C.

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission

across a network that cannot handle the original datagram size

D. All of the above







Answer: Option B

Explanation:



40. You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and 192.168.7.0. What subnet

mask can you use to combine these addresses into one?

A. 255.255.252.0 B. 225.255.254.0

C. 255.255.255.240 D. 255.255.255.252


Answer: Option A

Explanation:


41. With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to

open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets

and maximize the number of hosts available at each site?

A. 192 B. 224

C. 240 D. 248

E. 252


42. A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as

A. Gateways

B. mail gateway

C. bridges

D. User Agent



Answer: Option B

Explanation:









43. If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is

A. 1200 bands

B. 3200 bands

C. 4800 bands

D. 9600 bands



Answer: Option B

Explanation:



44. Error detection at a data link level is achieved by

A. bit stuffing

B. cyclic redundancy codes

C. Hamming codes

D. equalization


Answer: Option B

Explanation:



45. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is

A. question and answer

B. form filling

C. open-ended question

D. menu selection







Answer: Option D

Explanation:


46. Which network topology is considered passive?

A. Cross B. Ring

C. Star D. Mesh

E. Bus


Answer: Option E

Explanation:



47. If a firm wanted to transmit data from 1,000 punched cards to a remote computer, they would use a(n)

A. POS terminal

B. data collection terminal

C. batch processing terminal

D. intelligent terminal



Answer: Option C

Explanation:



48. Which address is the loopback address?

A. 0.0.0.1

B. 127.0.0.0

C. 127.0.0.1






D. 255.255.255.255



Answer: Option C

Explanation:



49. Error rate is

A. an error-detecting code based on a summation operation performed on the bits to be checked.

B. a check bit appended to an array of binary digits to make the sum of all the binary digits.

C.

a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an

expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors

is detected.

D. the ratio of the number of data units in error to the total number of data units



Answer: Option D

Explanation:



50. Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an

enterprise or with its trading partners. Select the best fit for answer:

A. Network Server

B. Virtual Private Network

C. Network operating system

D. OSI


Answer: Option B

Explanation:






1. Modem is used in data transmission. When was it invented and in which country?

A. 1963, USA

B. 1965, Germany

C. 1950, USA

D. 1950, Japan



Answer: Option C

Explanation:



2. Which of the following technique is used for Time-To-Line (TTL)?

A. a technique used in best-effort delivery system to avoid endlessly looping packets.

B.

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol

and places it in the data portion of the low level frame

C.

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission

across a network that cannot handle the original datagram size.

D. All of the above



Answer: Option A

Explanation:



3. Communication network is

A. one or more conductors that serve as a common connection for a related group of devices


C. the condition with two or more stations attempt to use the same channel at the same time






D.

a collection of interconnected functional units that provides a data communications service among stations

attached to the network



Answer: Option D

Explanation:



4. Which of the following is an advantage to using fiber optics data transmission?

A. resistance to data theft

B. fast data transmission rate

C. low noise level

D. few transmission errors

E. All of the above


Answer: Option E

Explanation:




A. if a host moves from one network to another, its IP address must change

B.

routing uses the network portion of the IP address, the path taken by packets travelling to a host with multiple

IP addresses depends on the address used.

C.

IP addresses encode both a network and a host on that network, they do not specify an individual machine, but

a connection to a network.

D. All of the above



Answer: Option D





Explanation:


6. Bandlimited signal is

A. transmission of signals without modulation

B. a signal all of whose energy is contained within a finite frequency range

C. simultaneous transmission of data to a number of stations

D. All of the above



Answer: Option B

Explanation:



7. Computers in a LAN can be interconnected by radio and infrared technologies.

A. Wireless LANs

B. Network Topologies

C. Multiplexer

D. Modem


Answer: Option A

Explanation:



8. You have a network ID of 134.57.0.0 and you need to divide it into multiple subnets in which at least 600 host IDs for each

subnet are available. You desire to have the largest amount of subnets available. Which subnet mask should you assign?

A. 255.255.224.0 B. 255.255.240.0

C. 255.255.248.0 D. 255.255.255.0

E. 255.255.255.255







Answer: Option D

Explanation:



9. How many digits of the Network User Address are known as the DNIC (Data Network Identification Code)?

A. first three

B. first four

C. first five

D. first seven



Answer: Option B

Explanation:



10. Which of the following is the address of the router?

A. The IP address

B. The TCP address

C. The subnet mask

D. The default gateway



Answer: Option D

Explanation:


11. Thorough planning must take place when setting up an 802.3 network. A maximum number of segments can separate any

two nodes on the network. What is the maximum number of segments allowed between two nodes?

A. Five B. Two






C. Four D. Six

E. Three


Answer: Option A

Explanation:



12. A devices that links two homogeneous packet-broadcast local networks, is

A. hub

B. bridge

C. repeater

D. gateway



Answer: Option B

Explanation:



13. Identify the odd term amongst the following group:

A. Coaxial cable

B. Optical fibre

C. Twisted pair wire

D. Microwaves



Answer: Option D

Explanation:







14. Which of the following divides the high speed signal into frequency bands?

A. t-switch

B. modem

C. frequency-division multiplexer

D. time-division multiplexer



Answer: Option C

Explanation:



15. What is the first octet range for a class C IP address?

A. 192 - 255

B. 192 - 223

C. 192 - 226

D. 128 - 191

E. 1 - 126


Answer: Option B

Explanation:


16. Which utility is useful for finding the local host name?

A. NBTSTAT

B. Netstat

C. PING

D. Hostname








Answer: Option D

Explanation:



17. Which of the following conditions is used to transmit two packets over a medium at the same time?

A. Contention B. Collision

C. Synchronous D. Asynchronous


Answer: Option B

Explanation:



18. The slowest transmission speeds are those of

A. twisted-pair wire

B. coaxial cable

C. fiber-optic cable

D. microwaves



Answer: Option A

Explanation:



19. Distributed Queue Dual Bus is a standard for

A. LAN







B. MAN

C. WAN

D. Wireless LAN.

E. LAN and MAN


Answer: Option E

Explanation:

This standard is part of a family of standards for local area networks (LANs) and metropolitan area networks (MANs) that

deals with the physical and data link layers as defined by the ISO open systems interconnection reference model. It defines

a high-speed shared medium access protocol for use over a dual, counterflowing, unidirectional bus subnetwork. The

physical layer and distributed queue dual bus (DQDB) layer are required to support a logical link control (LLC) sublayer by

means of a connectionless medium access control (MAC) sublayer service in a manner consistent with other IEEE 802

networks. Additional DQDB layer functions are specified as a framework for other services. These additional functions will

support isochronous service users and connection-oriented data service users, but their implementation is not required for

conformance.


20. A teleprocessing system may consist of

A. user systems

B. communications systems

C. computer center systems

D. All of the above



Answer: Option D

Explanation:


21. If the ASCII character G is sent and the character D is received, what type of error is this?

A. single-bit B. multiple-bit

C. burst D. recoverable


Answer: Option C

Explanation:





22. Which layer of OSI determines the interface of the system with the user?

A. Network

B. Application

C. Data-link

D. Session



Answer: Option B

Explanation:



23. The transfer of data from a CPU to peripheral devices of a computer is achieved through

A. modems

B. computer ports

C. interfaces

D. buffer memory



Answer: Option B

Explanation:



24. What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

A. 4

B. 2







C. 6

D. 3



Answer: Option D

Explanation:



25. Many data communication networks have been established which provide a wealth of on-demand information services to

people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to

select what they want?

A. Teletex system

B. Fax system

C. Videotex system

D. Microwave system



Answer: Option C

Explanation:


26. Which of the following statements is correct?

A. Terminal section of a synchronous modem contains the scrambler

B. Receiver section of a synchronous modem contains the scrambler

C. Transmission section of a synchronous modem contains the scrambler

D. Control section of a synchronous modem contains the scrambler



Answer: Option C

Explanation:






27. Which of the following characteristic(s) is/are suited to the PSS applications?

A. bursty traffic and low communications intensity

B. widely dispersed terminals and access to international packets switched services

C. Multiple remote host or applications accessed by a single local access circuit terminal and circuit

D. All of the above



Answer: Option D

Explanation:



28. Because the configuration infor-mation for a DHCP client is received dynamically, you must use which utility to read the

current configuration to verify the settings?

A. PING

B. TRACERT

C. ARP

D. IPCONFIG



Answer: Option D

Explanation:



29. Which of the following is separated by a subnet mask?

A. DHCP scopes

B. Network ID and host ID







C. Domains

D. Subnets


Answer: Option B

Explanation:



30. The signal to noise ratio for a voice grade line is 30.1 dB (decibels) or a power ratio of 1023:1. The maximum achievable

data rate on this line whose spectrum ranges from 300 Hz to 4300 Hz is

A. 6200 bps

B. 9600 bps

C. 34000 bps

D. 31000 bps



Answer: Option D

Explanation:


31. TCP is:

A. Operates at the Data Link layer

B. Connection orientated and unreliable

C. Connection orientated and reliable

D. Connectionless and unreliable


Answer: Option C

Explanation:



32. An encyclopedic database






A. is an information utility that specializes in storing and searching information

B. is generally free

C. is easy for beginners to use

D. All of the above



Answer: Option A

Explanation:




A. Protocol converters are the same as multiplexers

B. Protocol converters are the same as TDMs

C. Protocol converters are usually not operated in pairs.

D. Protocol converters are usually operated in



Answer: Option C

Explanation:



34. The dialogue techniques for terminal use do not include

A. questions and answers

B. open-ended questions

C. form fillings

D. menu display







Answer: Option B

Explanation:



35. You have a network ID of 192.168.10.0 and require at least 25 host IDs for each subnet, with the largest amount of

subnets available. Which subnet mask should you assign?

A. 255.255.255.192 B. 255.255.255.224

C. 255.255.255.240 D. 255.255.255.248

E. 255.255.255.255


Answer: Option B

Explanation:


36. The encoding method specified in the EIA-232 standard is _____.

A. NRZ-I

B. NRZ-L

C. Manchester

D. Differential Manchester


Answer: Option B

Explanation:



37. Examples are packet switching using frame relay, and cell switching using ATM technologies. Select the best fit for answer:




D. Extranets







Answer: Option B

Explanation:



38. The physical layer, in reference to the OSI model, defines

A. data link procedures that provide for the exchange of data via frames that can be sent and received

B. the interface between the X.25 network and packet mode device

C. the virtual circuit interface to packet-switched service

D. All of the above



Answer: Option B

Explanation:



39. A required characteristic of an online real-time system is:

A. more than one CPU

B. offline batch processing

C. no delay in processing

D. All of the above



Answer: Option C

Explanation:









40. How many class A, B, and C network IDs can exist?

A. 2,113,658

B. 16,382

C. 126

D. 128



Answer: Option A

Explanation:


41. The transmission signal coding method of TI carrier is called

A. Bipolar

B. NRZ

C. Manchester

D. Binary



Answer: Option A

Explanation:



42. Which of the following statement is correct?

A. Buffering is the process of temporarily storing the data to allow for small variation in device speeds

B. Buffering is a method to reduce cross-talks

C. Buffering is a method to reduce the routing overhead

D. Buffering is storage of data within the transmitting medium until the receiver is ready to receive






Answer: Option A

Explanation:



43. You are working with a network that has the network ID 192.168.10.0 and require nine subsets for your company and the

maximum number of hosts. What subnet mask should you use?

A. 255.255.255.192 B. 255.255.255.224

C. 255.255.255.240 D. 255.255.255.248

E. 255.255.255.252


Answer: Option C

Explanation:



44. Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted

to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving

end. What is this system of sending messages called?

A. Paperless office

B. Electronic mail

C. Global network

D. Electronic newspaper



Answer: Option B

Explanation:



45. HDLC (High-level Data Link Control) is

A. a method of determining which device has access to the transmission medium at any time







B. a method access control technique for multiple-access transmission media

C. a very common bit-oriented data link protocol issued by ISO.

D. network access standard for connecting stations to a circuit-switched network



Answer: Option C

Explanation:


46. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports four

subnets and a maximum number of hosts?

A. 255.255.255.192 B. 255.255.255.224

C. 255.255.255.240 D. 255.255.255.248

E. 255.255.255.252


Answer: Option B

Explanation:



47. Establishing a virtual connection is functionally equivalent to

A. Connecting as virtual memory

B. Physically connecting a DTE and DCE

C. Placing a telephone call prior to a conversation

D. Placing a modem prior to a conversation



Answer: Option C

Explanation:








48. The first step in troubleshooting many problems is to verify which of the following?

A. The subnet mask is valid

B. TCP/IP is installed correctly on the client

C. The WINS server is running

D. The BDC is operable



Answer: Option B

Explanation:



49. You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This

assumes support for eight subnets. What subnet mask should you use?

A. 255.255.192.0 B. 255.255.224.0

C. 255.255.240.0 D. 255.255.248.0

E. 255.255.255.0


Answer: Option C

Explanation:



50. Which of the following files is used for NetBIOS name resolution?

A. HOSTS

B. LMHOSTS

C. ARP

D. FQDN







Answer: Option B

Explanation:


1. What protocol is used between E-Mail servers?

A. FTP B. SMTP

C. SNMP D. POP3


Answer: Option B

Explanation:



2. If you configure the TCP/IP address and other TCP/IP parameters manually, you can always verify the configuration

through which of the following? Select the best answer.

A. Network Properties dialog box

B. Server Services dialog box

C. DHCPINFO command-line utility

D. Advanced Properties tab of TCP/ IP Info.



Answer: Option A

Explanation:



3. In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and

A. PC

B. synchronous port

C. crossover cable

D. asynchronous port








Answer: Option D

Explanation:



4. Which of the following communications service provides message preparation and transmission facilities?

A. Teletex

B. Teletext

C. x400

D. Fax



Answer: Option A

Explanation:



5. Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the

maximum window size?

A. 4

B. 8

C. 15

D. 16



Answer: Option C

Explanation:


6. A hard copy would be prepared on a






A. typewriter terminal

B. line printer

C. plotter

D. All of the above



Answer: Option D

Explanation:



7. Which of the following device copies electrical signals from one Ethernet to another?

A. bridge

B. repeater

C. hub

D. passive hub



Answer: Option B

Explanation:



8. Stephanie is in charge of a small network and wants to make it simple but secure. The users want to have full control over

their data and still be able to share data with the rest of the office. The networking knowledge of the office staff is basic.

Which network(s) would be the best for Stephanie to set up?

A. Peer-to-peer

B. Master domain

C. Server-based

D. WAN





E. Share-level


Answer: Option C

Explanation:



9. When UPC is used, the price of the item is located

A. on the item

B. on the item and on the shelf

C. in computer storage

D. on the shelf and in computer storage



Answer: Option D

Explanation:



10. Error control is needed at the transport layer because of potential errors occurring _____.

A. from transmission line noise

B. in routers

C. from out-of-sequence delivery

D. from packet losses.


Answer: Option B

Explanation:


11. The transport layer protocol is connectionless.

A. NVT






B. FTP

C. TCP

D. UDP



Answer: Option D

Explanation:



12. The fundamental requirements of private-to-public network interconnection methods which need to be provided in

gateways is/are

A. universal accessibility for private network Data Terminal Equipment (DTE)

B. adequate cost control mechanisms for administration of the private networks

C. to assign address to private network DTEs

D. a and b both



Answer: Option D

Explanation:



13. Communication between computers is almost always

A. serial

B. parallel

C. series parallel

D. direct







Answer: Option A

Explanation:



14. Which of the following is considered a broadband communications channel?

A. coaxial cable

B. fiber optic cable

C. microwave circuits

D. satellites systems

E. All of the above


Answer: Option E

Explanation:



15. Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what

is the mean number of transmissions required to send a frame if acknowledgements are never lost.

A. P I (K + 1)

B. KIK (1 + F)

C. 1/ (1 - F)

D. K I (K - P)



Answer: Option C

Explanation:


16. Which of the following characteristics is not true of NetBEUI?

A. Highly-customizable






B. Routable

C. Little configuration required

D. Fast for small networks to Self-tuning


Answer: Option B

Explanation:



17. The difference between a multiplexer and a statistical multiplexer is

A. Statistical multiplexers need buffers while multiplexers do not need buffers

B. Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

C. Multiplexers often waste the output link capacity while statistical multiplexers optimize its use

D.

Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division

Multiplexing (FDM)



Answer: Option A

Explanation:



18. You are trying to decide which type of network you will use at your office, and you want the type that will provide

communication and avoid collisions on the cable. Which of the following is the best choice?

A. Token-Ring B. CSMA/CD

C. Ethernet D. CSMA/CA

E. ARCnet


Answer: Option A

Explanation:







19. Which of the following network access standard is used for connecting stations to a packet-switched network?

A. X.3

B. X.21

C. X.25

D. X.75



Answer: Option C

Explanation:



20. Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit

for answer:

A. TCP/IP

B. Protocol

C. Open Systems

D. Internetwork processor


Answer: Option D

Explanation:


21. A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as

A. Attenuation

B. Amplitude

C. Aloha

D. Carrier








Answer: Option A

Explanation:



22. The term "remote job entry" relates to

A. batch processing

B. realtime processing

C. transaction processing

D. distributed processing



Answer: Option A

Explanation:



23. Which of the following performs modulation and demodulation?

A. fiber optic

B. satellite

C. coaxial cable

D. modem



Answer: Option D

Explanation:








24. Data communications monitors available on the software market include

A. ENVIRON/1

B. TOTAL

C. BPL

D. Telenet



Answer: Option A

Explanation:




A.

A spin stabilized satellite used solar cells mounted on a cylinder body that continuously rotates so that 40 a time

and it also uses gyroscopic action of a spinning satellite to maintain its orientation towards the earth and the

sun.

B. A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun

C.

Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for

transmission to earth stations.

D. satellite transponders use a single frequency for reception and transmission from one point on earth to another



Answer: Option A

Explanation:


26. What is the default subnet mask for a class A network?

A. 127.0.0.1

B. 255.0.0.0

C. 255.255.255.0.0

D. 255.255.255.0







Answer: Option B

Explanation:



27. When using the loopback address, if TCP/IP is installed correctly, when should you receive a response?

A. Immediately

B. Only if the address fails

C. After the next host comes online

D. Within two minutes



Answer: Option A

Explanation:




A.

Satellite transponders contain a receiver and transmitter designed to relay microwave transmissions from one

point on earth to another.

B.

Satellite transponders contain a device that echos the radiation without change from one point on earth to

another.

C.

Satellite transponder contains devices that transform the message sent from one location on earth to a different

code for transmission to another location.

D.

Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for

transmission to earth stations



Answer: Option A





Explanation:



29. The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the

best fit for answer:

A. Internetworked enterprise

B. Information super highway

C. Business applications of telecommunications

D. Client/Server networks



Answer: Option A

Explanation:



30. The data communication support should include, but is not restricted to

A. file transfer and transaction processing

B. file and database access

C. terminal support, electronic mail and voice grams.

D. All of the above


Answer: Option D

Explanation:


31. MAC is


B. a method access control technique or multiple-access transmission media

C. a very common bit-oriented data link protocol issued to ISO.









Answer: Option A

Explanation:



32. What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

A. Teleport

B. Modem

C. Multiplexer

D. Concentrator



Answer: Option B

Explanation:



33. You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an

additional 30 for the company that will merge with you within a month. Each network will contain approximately 600

nodes. What subnet mask should you assign?

A. 255.255.192.0 B. 255.255.224.0

C. 255.255.240.0 D. 255,255.248.0

E. 255.255.252.0


Answer: Option E

Explanation:



34. Which application allows a user to access and change remote files without actual transfer?







A. TELNET

B. NFS

C. FTP

D. DNS



Answer: Option B

Explanation:



35. Parity bit is

A. an error-detecting code based on a summation operation performed on the bits to be checked.


C.


expression, the resulting expression will not conform to the rules of construction and thus the presence of the

errors in detected




Answer: Option B

Explanation:


36. Which of the following file retrieval methods use hypermedia?

A. HTTP

B. WAIS

C. Veronica

D. Archie






Answer: Option A

Explanation:



37. Which IP address class has few hosts per network?

A. D

B. C

C. B

D. A



Answer: Option B

Explanation:



38. Microprogramming is

A. assembly language programming

B. programming of minicomputers

C. control unit programming

D. macro programming of microcomputers



Answer: Option C

Explanation:



39. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 12







hosts and a maximum number of subnets?

A. 255.255.255.192

B. 255.255.255.224

C. 255.255.255. 240

D. 255.255.255.248

E. 255.255.255.252


Answer: Option C

Explanation:



40. Which of the following statements is incorrect?

A.

Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one

communication line.

B. HDLC is a standard synchronous communication protocol.

C.

RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is

ready to accept data.

D. RTS/CTS is the way the terminal indicates ringing



Answer: Option D

Explanation:


41. If communication software can be called the "traffic cop" of a micro communication system, then what should the modem

be called?

A. Park

B. Bridge

C. Interface

D. Link






Answer: Option B

Explanation:



42. Which of the following specifies the network address and host address of the computer?

A. The IP address

B. The TCP address

C. The subnet mask




Answer: Option A

Explanation:



43. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic

Industries Association of America. What do the letters 'RS' stand for?

A. Recognised standard

B. Random sequence

C. Recommended standard

D. Registered source



Answer: Option C

Explanation:









44. A network that requires human intervention of route signals is called a

A. bus network

B. ring network

C. star network

D. T-switched network



Answer: Option D

Explanation:



45. What is the port number for POP3?

A. 110 B. 90

C. 80 D. 49


Answer: Option A

Explanation:


46. Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages

selectively?

A. SMTP B. DHCP

C. IMAP D. POP3


Answer: Option

Explanation:



47. On a class C network with a subnet mask of 192, how many subnets are available?

A. 254 B. 62






C. 30 D. 14

E. 2


Answer: Option

Explanation:



48. Ethernet and Token-Ring are the two most commonly used network architectures in the world. Jim has heard of the

different topologies for networks and wants to choose the architecture that will provide him with the most options. Which of

the following would that be? Choose the most correct answer.

A.

Token-Ring because it currently can run at both 4Mbps and 16Mbps. This means that it can be used in any

topology

B. Ethernet, because it is cabled using fiber-optic cable

C. Token-Ring, because it uses a MAU

D. Ethernet, because it can be set up with most topologies and can use multiple transfer speeds

E. Neither Token-Ring nor Ethernet is the proper choice. Only ARCnet can be used in all topologies


Answer: Option

Explanation:



49. A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per

second) that are sent, if CCITT 2.048 Mbps encoding is used.

A. 500 Kbps

B. 32 Kbps

C. 8 Kbps

D. 64 Kbps.


Answer: Option





Explanation:



50. How can you see the address of the DHCP server from which a client received its IP address?

A. By using Advanced Properties of TCP/IP

B. By using IPCONFIG/ALL

C. By using DHCPINFO

D. By pinging DHCP



Answer: Option

Explanation:


1. In a synchronous modem, the receive equalizer is known as

A. adaptive equalizer

B. impairment equalizer

C. statistical equalizer

D. compromise equalizer



Answer: Option A

Explanation:



2. Alex is required to provide information on how many people are using the network at any one time. Which network will

enable him to do so?

A. Server-based B. Token-Ring

C. Ethernet D. Star

E. Peer-to-peer







Answer: Option A

Explanation:



3. Now-a-days computers all over the world can talk to each other. Which is one of the special accessories essential for this

purpose?

A. Keyboard

B. Modem

C. Scanner

D. Fax



Answer: Option B

Explanation:



4. To make possible the efficient on-line servicing of many teleprocessing system users on large computer systems, designers

are developing

A. communication systems

B. multiprogramming systems

C. virtual storage systems

D. All of the above



Answer: Option D

Explanation:









5. Which of the following best describes the scopes on each DHCP server, in the absence of configuration problems with DHCP

addresses, if you use multiple DHCP servers in your environment?

A. Unique to that subnet only

B. For different subnets

C. For no more than two subnets

D. For no subnets



Answer: Option B

Explanation:


6. The main difference between TCP and UDP is

A. UDP is connection oriented where as TCP is datagram service

B. TCP is an Internet protocol where as UDP is an ATM protocol

C. UDP is a datagram where as TCP is a connection oriented service

D. All of the above


Answer: Option C

Explanation:



7. What operates in the Data Link and the Network layer?

A. NIC

B. Bridge

C. Brouter

D. Router






Answer: Option C

Explanation:



8. What is the name of the computer based EMMS that provides a common forum where users can check in at their

convenience, post messages, actively exchange ideas and participate in ongoing discussions?

A. E-mail

B. Bulletin board system (BBS)

C. Teleconferencing

D. Videoconferencing



Answer: Option B

Explanation:




A. The CCITT Recommendation X.25 specifies three layers of communication: physical, link and network.

B. The second layer of communication is the data-link layer

C. Errors in the physical layer can be detected by the data link layer

D. The fourth layer, in reference to the OSI model, is the session layer



Answer: Option D

Explanation:









10. Devices on one network can communicate with devices on another network via a

A. file server

B. utility server

C. printer server

D. gateway



Answer: Option D

Explanation:


11. After coding a document into a digital signal, it can be sent by telephone, telex or satellite to the receiver where the signal

is decoded and an exact copy of the original document is made. What is it called?

A. Telex

B. Word processor

C. Facsimile

D. Electronic mail



Answer: Option C

Explanation:



12. Which file transfer protocol uses UDP?

A. NFS

B. TELNET

C. TFTP

D. FTP






Answer: Option C

Explanation:



13. You are working with a class C network. You are required to configure it for five subnets, each of which will support 25

nodes. What subnet should you use?

A. 255.255.255.0 B. 255.255.255.224

C. 255.255.255.240 D. 255.255.255.248

E. 255.255.255.252


Answer: Option B

Explanation:



14. A network designer wants to connect 5 routers as point-to-point simplex line. Then the total number of lines required

would be

A. 5

B. 10

C. 20

D. 32



Answer: Option B

Explanation:



15. Which of the following medium access control technique is used for bus/tree?

A. token ring







B. token bus

C. CSMA

D. MAC



Answer: Option B

Explanation:


16. A distributed data processing configuration in which all activities must pass through a centrally located computer is called

a:

A. ring network

B. spider network

C. hierarchical network

D. data control network



Answer: Option B

Explanation:



17. The size or magnitude of a voltage or current waveform is

A. Amplitude

B. Aloha

C. Angle Modulation

D. Attenuation



Answer: Option A




Explanation:



18. Which of the following network access standard is used for connecting stations to a circuit-switched network?

A. X.3

B. X.21

C. X.25

D. X.75



Answer: Option B

Explanation:



19. Which of the following is not a transmission medium?

A. telephone lines

B. coaxial cable

C. modem

D. microwave systems

E. satellite systems


Answer: Option C

Explanation:




A.

Gateways are assumed to know correct routes; hosts begin with minimal routing information and learn new

routes from gateways.







B.

Layered protocols are designed so that layer n at the destination receives exactly the same object sent by layer

n at the source.

C.

Application programs as well as all protocol software from the Internet layer upward use only IP addresses; the

network interface layer handles physical addresses.

D. All of the above



Answer: Option D

Explanation:


21. A batch processing terminal would not include a

A. CPU

B. card reader

C. card punch

D. line printer



Answer: Option A

Explanation:



22. Packet Switch Stream (PSS) was introduced in

A. the US in 1961 (&) the UK in 1981

B. the UK in 1980

C. the US in 1961

D. None of the above


Answer: Option B

Explanation:






23. The physical layer of a network

A. defines the electrical characteristics of signals passed between the computer and communication devices

B. controls error detection and correction

C. constructs packets of data and sends them across the network

D. All of the above



Answer: Option A

Explanation:



24. Which of the following allows devices on one network to communicate with devices on another network?

A. multiplexer

B. gateway

C. t-switch

D. modern



Answer: Option B

Explanation:



25. An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined

binary number, is known as

A. Cyclic redundancy check

B. Checksum







C. Error detecting code

D. Error rate



Answer: Option A

Explanation:


26. Bulletin board system

A. is a public access message system

B. is a modem capable of accepting commands

C. converts analog signals to digital signals

D. converts digital signals to analog signals



Answer: Option A

Explanation:



27. In OSI model, which of the following layer provides error-free delivery of data?

A. Data link

B. Network

C. transport

D. Session



Answer: Option C

Explanation:







28. Error detection at the data link level is achieved by?

A. Bit stuffing

B. Hamming codes

C. Cyclic Redundancy codes

D. Equalization



Answer: Option C

Explanation:



29. The area of coverage of a satellite radio beam is known as

A. Footprint

B. Circular polarization

C. Beam width

D. Identity



Answer: Option A

Explanation:



30. Which of the following data transmission media has the largest terrestrial range without the use of repeaters or other

devices?

A. Hardwiring

B. Microwave

C. Satellite






D. Laser



Answer: Option C

Explanation:


31. What is the minimum number of wires needed to send data over a serial communication link layer?

A. 1

B. 2

C. 4

D. 6

E. none of the above


Answer: Option B

Explanation:



32. The _____ layer is the layer closest to the transmission medium.

A. transport

B. network

C. data link

D. physical



Answer: Option D

Explanation:








33. What is the name of the device that connects two computers by means of a telephone line?

A. Tape

B. modem

C. bus

D. cable



Answer: Option B

Explanation:



34. What is the main difference between DDCMP and SDLG?

A. DDCMP does not need special hardware to final the beginning of a message.

B. DDCMP has a message header

C. SDLC has a IP address

D. SDLC does not use CRC



Answer: Option A

Explanation:



35. On a class B network, how many subnets are available with a subnet mask of 248?

A. 2 B. 6

C. 30 D. 62

E. 126






Answer: Option C

Explanation:


36. Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more

nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as

size increases.

A. Network collisions occur

B. Repeaters cannot increase the signal strength sufficiently

C. Cable terminators do not reflect the signal properly

D. Cable terminators do not absorb the signal properly

E. "Line echo" occurs due to the impedance of the cable


Answer: Option A

Explanation:



37. In a _____ topology, if there are n devices in a network, each device has n - 1 ports for cables.

A. ring

B. bus

C. star

D. mesh



Answer: Option D

Explanation:



38. Typewriter terminals can print computer-generated data at a rate of

A. 10 characters per second






B. 120 characters per second

C. 120 characters per minute

D. 1200 characters per minute



Answer: Option B

Explanation:



39. To avoid transmission errors, a check figure is calculated by the

A. transmitting computer

B. receiving computer

C. both (a) and (b)

D. Start and stop bit



Answer: Option C

Explanation:



40. What is the first octet range for a class A IP address?

A. 1 - 126

B. 192 - 255

C. 192 - 223

D. 1 - 127

E. 128 - 191






Answer: Option A

Explanation:


41. Which of the following is not a standard synchronous communication protocol?

A. SDLC

B. SMTP

C. SLIP

D. PAS



Answer: Option D

Explanation:



42. The network layer, in reference to the OSI model, provide




D. All of the above



Answer: Option C

Explanation:



43. In OSI network architecture, the routing is performed by

A. network layer






B. data link layer

C. transport layer

D. session layer



Answer: Option A

Explanation:



44. Which of the following communications lines is best suited to interactive processing applications?

A. narrowband channels

B. simplex lines

C. full-duplex lines

D. mixed band channels



Answer: Option C

Explanation:



45. What is the first octet range for a class B IP address?

A. 128 - 255

B. 1 - 127

C. 192 - 223

D. 128 - 191

E. 127 - 191






Answer: Option D

Explanation:


46. The 32-bit internet address 10000000 00001010 00000010 00011110 will be written in dotted decimal notation as

A. 148.20.2.30

B. 164.100.9.61

C. 210.20.2.64

D. 128.10.2.30



Answer: Option D

Explanation:



47. Which of the following items is not used in Local Area Networks (LANs)?

A. Computer

B. Modem

C. Printer

D. Cable



Answer: Option B

Explanation:



48. Error detection at a data link level is achieved by

A. bit stuffing






B. cyclic redundancy codes

C. Hamming codes

D. equalization



Answer: Option B

Explanation:



49. RS-232-G

A. is an interface between two data circuit terminating equipment as examplified by a local and remote modem

B. is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment

C. specifies only the mechanical characteristics of an interface by providing a 25-pin connector

D. requires only 7 pin out of 25 in order to transmit digital data over public telephone lines



Answer: Option B

Explanation:



50. A subdivision of main storage created by operational software is referred to as a:

A. compartment

B. time-shared program

C. divided core

D. partition







Answer: Option D

Explanation:


1. RS-449/442-A/423-A is

A. a set of physical layer standards developed by EIA and intended to replace RS-232-C.

B. a check bit appended to an array of binary digits to make the sum of the all the binary digits

C.


expression the resulting expression will not conform to the rules of construction and thus the presence of the

errors is detected




Answer: Option A

Explanation:



2. Which of the following digits are known as the area code of the Network User Address (NUA)?

A. 5-7

B. 1-4

C. 8-12

D. 13-14



Answer: Option A

Explanation:



3. End-to-end connectivity is provided from host-to-host in:

A. Network layer






B. Session layer

C. Data link layer

D. Transport layer



Answer: Option D

Explanation:



4. A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the

modulating signal, is known as

A. Aloha

B. Angle modulation

C. Amplitude modulation

D. modem



Answer: Option C

Explanation:



5. CSMA (Carrier Sense Multiple Access) is


B. a method access control technique for multiple-access transmission media.

C. a very common bit-oriented data link protocol issued by ISO.








Answer: Option B

Explanation:


6. Which of the following summation operation is performed on the bits to check an error-detecting code?

A. Codec

B. Coder-decoder

C. Checksum

D. Attenuation



Answer: Option C

Explanation:



7. The standard suit of protocols used by the Internet, intranets, extranets, and some other networks.

A. TCP/IP

B. Protocol

C. Open Systems



Answer: Option A

Explanation:



8. Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of

topology?

A. Linear bus

B. Modified star






C. Modified ring

D. Ring

E. Hybrid hub


Answer: Option D

Explanation:



9. A communications device that combines transmissions from several 1/ O devices into one line is a:

A. concentrator

B. modifier

C. multiplexer

D. full-duplex line



Answer: Option C

Explanation:



10. The main difference between synchronous and asynchronous transmission is

A. the clocking is derived from the data in synchronous transmission

B. the clocking is mixed with the data in asynchronous transmission

C. the pulse height is different.

D. the bandwidth required is different



Answer: Option A





Explanation:


11. ARP (Address Resolution Protocol) is


B. a TCP/IP high level protocol for transferring files from one machine to another





Answer: Option A

Explanation:



12. Which of the following uses network address translation?

A. Routers

B. Network adapter drivers

C. Hubs

D. Windows 95


Answer: Option B

Explanation:



13. The X.25 standard specifies a

A. technique for start-stop data

B. technique for dial access

C. DTE/DCE interface

D. data bit rate








Answer: Option C

Explanation:



14. The most important part of a multiple DHCP configurations is to make sure you don't have which of the following in the

different scopes? Select the best answer.

A. Duplicate addresses

B. Duplicate pools

C. Duplicate subnets

D. Duplicate default gateways



Answer: Option A

Explanation:



15. When a group of computers is connected together in a small area without the help of telephone lines, it is called

A. Remote communication network (RCN)

B. Local area network(LAN)

C. Wide area network (WAN)

D. Value added network (VAN)



Answer: Option B

Explanation:


16. The 802.5 standard implements a way for preventing collisions on the network. How are collisions prevented when using






this standard?

A. CSMA/CD

B. Token passing

C. Collision detection

D. Time sharing

E. Switched repeaters


Answer: Option B

Explanation:



17. A communication network which is used by large organizations over regional, national or global area is called

A. LAN

B. WAN

C. MAN

D. Intranet



Answer: Option B

Explanation:



18. Information systems with common hardware, software, and network standards that provide easy access for end users and

their networked computer systems. Select the best fit for answer:

A. TCP/IP

B. Protocol

C. Open Systems







Answer: Option C

Explanation:



19. Which of the following TCP/IP protocol is used for file transfer with minimal capability and minimal overhead?

A. RARP

B. FTP

C. TFTP

D. TELNET



Answer: Option C

Explanation:



20. Terminals are required for

A. realtime, batch processing, and timesharing

B. realtime, timesharing, and distributed processing

C. realtime, distributed processing, and manager inquiry

D. realtime, timesharing, and message switching



Answer: Option D

Explanation:


21. Sending a file from your personal computer's primary memory or disk to another computer is called

A. uploading






B. downloading

C. logging on

D. hang on


Answer: Option A

Explanation:



22. Business meeting and conferences can be held by linking distantly located people through a computer network. Not only

the participants exchange information but are able to see each other. What is it called?

A. Telemeeting

B. Telemailing

C. Teleconferencing

D. Teletalking



Answer: Option C

Explanation:



23. What frequency range is used for microwave communications, satellite and radar?

A. Low Frequency : 30 kHz to 300 kHz

B. Medium Frequency : 300 kHz to 3 MHz

C. Super High Frequency : 3000 MHz to 30000 MHz

D. Extremely High Frequency :30,000 MHz







Answer: Option D

Explanation:



24. Which of the following statements is incorrect?

A.

The difference between synchronous and asynchronous transmission is the clocking derived from the data in

synchronous transmission

B. Half-duplex line is a communication line in which data can move in two directions, but not at the same time.

C. Teleprocessing combines telecommunications and DP techniques in online activities.

D. Batch processing is the preferred processing mode for telecommunication operations



Answer: Option D

Explanation:



25. If the ASCII character H is sent and the character I is received, what type of error is this?

A. single-bit B. multiple-bit

C. burst D. recoverable


Answer: Option A

Explanation:


26. A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is

selected, then how many bits per second are actually sent?

A. 32 kbps

B. 8 kbps

C. 128 kbps

D. 64 kbps.







Answer: Option B

Explanation:



27. UDP is:

A. Not a part of the TCP/IP suite

B. Connection oriented and unreliable

C. Connection orientated and reliable

D. Connectionless and unreliable


Answer: Option D

Explanation:



28. The interactive transmission of data within a time sharing system may be best suited to

A. simplex lines

B. half-duplex lines

C. full-duplex lines

D. biflex-line



Answer: Option B

Explanation:



29. What OSI layer handles logical address to logical name resolution?







A. Transport

B. Physical

C. Presentation

D. Data Link


Answer: Option A

Explanation:



30. The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is

essential for communication. What does MAC provide?

A. A logical address that identifies the workstation

B. A physical address that is randomly assigned each time the computer is started

C. A physical address that is assigned by the manufacturer

D. The logical domain address for the workstation

E. An alias for the computer name


Answer: Option C

Explanation:


31. Which of the following is an example of a client-server model?

A. TELNET

B. FTP

C. DNS

D. All of the above



Answer: Option D




Explanation:



32. In CRC there is no error if the remainder at the receiver is _____.

A. the quotient at the sender

B. nonzero

C. zero

D. equal to the remainder at the sender

E. None of the above.


Answer: Option A

Explanation:



33. A WATS arrangement

A. is always less expensive than flat-rate service

B. is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

C. is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

D. is never less expensive than flat-rate service



Answer: Option B

Explanation:



34. A T-switch is used to

A. control how messages are passed between computers







B. echo every character that is received

C. transmit characters one at a time

D. rearrange the connections between computing equipment



Answer: Option D

Explanation:



35. A global network of millions of business, government, educational, and research networks; computer systems; database;

and end users. Select the best fit for answer:

A. Internet works

B. The Internet

C. Internet revolution

D. Internet technologies



Answer: Option B

Explanation:


36. Alice is setting up a small network in her home so that she can study for her MCSE exams. She doesn't have a lot of money

to spend on hardware, so she wants to use a network topology that requires the least amount of hardware possible. Which

topology should she select?

A. Star B. Right

C. Token-Ring D. Ethernet

E. Bus


Answer: Option E

Explanation:






37. The CCITT Recommendation X.25 specifies three layers of communications:

A. application, presentation and session

B. Session, transport and network

C. physical datalink and network

D. datalink, network and transport


Answer: Option C

Explanation:



38. Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?

A. Amplitude modulation

B. Frequency-division multiple access

C. Frequency modulation

D. Frequency-shift keying



Answer: Option B

Explanation:



39. The amount of uncertainty in a system of symbol is called

A. Bandwidth

B. Entropy

C. loss







D. Quantum



Answer: Option B

Explanation:



40. Which of the following allows a simple email service and is responsible for moving messages from one mail server to

another?

A. IMAP B. DHCP

C. SMTP D. FTP

E. POP3


Answer: Option C

Explanation:


41. What does 192 translate to in binary?

A. 11000000

B. 00111110

C. 00001111

D. 00000011



Answer: Option A

Explanation:



42. An information utility can offer a user

A. instant bonds and stock quotations






B. news stories from wire services

C. complete airline schedules for all domestic flights

D. All of the above



Answer: Option D

Explanation:



43. An international standard, multilevel set of protocols to promote compatibility among telecommunications networks. Select

the best fit for answer:

A. Network Server



D. OSI


Answer: Option D

Explanation:



44. Many large organizations with their offices in different countries of the world connect their computers through

telecommunication satellites and telephone lines. Such a communication network is called

A. LAN

B. WAN

C. ECONET

D. EITHERNET







Answer: Option B

Explanation:



45. A network which is used for sharing data, software and hardware among several users owning microcomputers is called

A. WAN

B. MAN

C. LAN

D. VAN



Answer: Option C

Explanation:


46. In geosynchronous orbit, satellite

A. remains in a fixed position so that as earth rotates, it can fully cover the earth

B. remains in a fixed position related to points on earth

C. moves faster than the earth's rotation so that it can cover larger portion of earth.

D. moves simultaneously



Answer: Option A

Explanation:



47. A proposed network infrastructure of interconnected local, regional, and global networks that would support universal

interactive multimedia communications. Select the best fit for answer:











Answer: Option B

Explanation:




A. 11110000

B. 00011110

C. 00001111

D. 11100000



Answer: Option A

Explanation:



49. You are working with a network that has the network ID 10.9.0.0 and contains 73 networks. In the next year, you will be

adding an additional 27 branch offices to your company. For simplified management, you want to keep the most possible

hosts per subnet. Which subnet mask should you management, you want to keep the most possible hosts per subnet.

Which subnet mask should you use?

A. 255.224.0.0 B. 255.240.0.0

C. 255.248.0.0 D. 255.252.0.0

E. 255.254.0.0


Answer: Option E

Explanation:







50. A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I

communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J.

Then find the mean router-router path length.

A. 2 (m - 2)

B. 2 (2m - 1)

C. m - 1

D. (2m - l)/mJ


Answer: Option A

Explanation:


1. Most networks are connected to other local area or wide area networks. Select the best fit for answer:

A. Internet works

B. The Internet

C. Internet revolution

D. Internet technologies


Answer: Option A

Explanation:



2. You are working with a network that is 172.16.0.0 and would like to support 600 hosts per subnet. What subnet mask

should you use?

A. 255.255.192.0 B. 255.255.224.0

C. 255.255.240.0 D. 255.255.248.0

E. 255.255.252.0


Answer: Option E






Explanation:



3. A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission

rate?

A. 1.5 Mbaud/sec

B. 6 Mband/sec

C. 12 Mbaud/sec

D. 24 Mbaud/sec



Answer: Option C

Explanation:



4. Which of the following digits are known as the sub-address digits (for use by the user) of the Network User Address (NUA)?

A. 5-7

B. 1-4

C. 8-12

D. 13-14



Answer: Option D

Explanation:



5. Error detecting code is

A. an error-detecting code based on a summation operation performed on the bits to be checked








C.

a code in which each expression conforms to specify rules of construction, so that if certain errors occur in an

expression, the resulting expression will not conform to the rules of construction and thus the presence of the

error is detected.

D. the ratio of the data units in error to the total number of data units



Answer: Option C

Explanation:


6. A modulator converts a _____ signal to a(n) _____ signal.

A. FSK; PSK

B. PSK; FSK

C. analog; digital

D. digital; analog



Answer: Option D

Explanation:



7. The birthplace of the World Wide Web is considered to be

A. the Department of Defense

B. CERN

C. ARPA

D. Netscape



Answer: Option B




Explanation:



8. You have purchased a MAU (Multistation Access Unit) from your computer supplier and now must decide what type of

network card you should install in the workstations. Which of the following would be the most appropriate?

A. Fast SCSI Wide

B. Token-Ring

C. ArcServe

D. Ethernet



Answer: Option B

Explanation:



9. What is the loopback address?

A. 127.0.0.1

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.255.0



Answer: Option A

Explanation:



10. An ROP would be attached to a

A. simplex channel







B. duplex channel

C. half duplex channel

D. full duplex channel



Answer: Option A

Explanation:


11. Who originally designed TCP/IP?

A. The Department of Defense

B. Novell

C. IBM

D. Xerox


Answer: Option A

Explanation:



12. The systematic access of small computers in a distributed data processing system is referred to as:

A. dialed service

B. multiplexing

C. polling

D. conversational mode



Answer: Option C

Explanation:







13. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to

as:

A. modulation

B. demodulation

C. synchronizing

D. synchronizing



Answer: Option B

Explanation:



14. An example of digital, rather than analog, communication is

A. DDD

B. DDS

C. WATS

D. DDT



Answer: Option B

Explanation:



15. How many OSI layers are covered in the X.25 standard?

A. two

B. three

C. seven






D. six



Answer: Option B

Explanation:


16. A band is always equivalent to

A. a byte

B. a bit

C. 100 bits

D. 16 bits



Answer: Option E

Explanation:



17. What is the port number for HTTP?

A. 99 B. 86

C. 80 D. 23


Answer: Option C

Explanation:



18. The most flexibility in how devices are wired together is provided by

A. bus networks

B. ring networks






C. star networks

D. T-switched networks



Answer: Option A

Explanation:




A.

The transport layer provides for any format, translationer code conversion necessary to put the data into an

intelligible format.

B. The presentation layer transforms information from machine format to the understandable format.

C. The data link layer handles the transfer of data between the ends of a physical link.

D. All of the above



Answer: Option A

Explanation:



20. When you connect to an online information service, you are asked to provide some kind of identification such as your

name, an account number and a password. What is the name given to this brief dialogue between you and the information

system?

A. Security procedure

B. Safeguard procedure

C. Identification procedure

D. Log-on procedure







Answer: Option D

Explanation:


21. Bus is

A. one or more conductors that some as a common connection for a related group of devices


C. the condition when two or more stations attempt to use the same channel at the same time

D.

a collection of interconnected functional units that provides a data communications service among stations

attached to the network



Answer: Option A

Explanation:



22. Which of the following medium is used for broadband local networks?

A. Coaxial cable

B. optic fiber

C. CATV

D. UTP



Answer: Option C

Explanation:



23. In cyclic redundancy checking what is the CRC?

A. the divisor






B. the quotient

C. the dividend

D. the remainder


Answer: Option D

Explanation:



24. What is the maximum number of entries in the HOSTS file?

A. 8

B. 255

C. 500

D. Unlimited



Answer: Option D

Explanation:



25. The communication mode that supports data in both directions at the same time is

A. simplex

B. half-duplex

C. full-duplex

D. multiplex



Answer: Option C





Explanation:


26. Which of the following program is used to copy files to or from another UNIX timesharing system over a single link?

A. VMTP

B. TFTP

C. UUCP

D. UART



Answer: Option C

Explanation:



27. One important characteristic of the hub architecture of ARC-net is

A. directionalized transmission

B. access control and addressing

C. multiple virtual networks

D. alternative routing



Answer: Option A

Explanation:



28. The basic Ethernet design does not provide

A. access control

B. addressing

C. automatic retransmission of a message






D. multiple virtual networks



Answer: Option C

Explanation:



29. Phase shift keying (psk) method is used to modulate digital signals at 9600 bps using 16 levels. Find the line signaling

speed (i.e., modulation rate)

A. 2400 bands

B. 1200 bands

C. 4800 bands

D. 9600 bands.


Answer: Option A

Explanation:



30. You are in the process of analyzing a problem that requires you to collect and store TCP/IP Packets. Which of the following

utilities is best suited for this purpose?

A. NBTSTAT

B. Performance Monitor

C. NETSTAT

D. Network Monitor

E. DHCP Management Console


Answer: Option D

Explanation:







31. A software that allows a personal computer to pretend it as a terminal is

A. auto-dialing

B. bulletin board

C. modem

D. terminal emulation



Answer: Option A

Explanation:



32. What is the name of the network topology in which there are bi-directional links between each possible node?

A. Ring

B. Star

C. Tree

D. Mesh



Answer: Option D

Explanation:



33. What is the main purpose of a data link content monitor?

A. to detect problems in protocols

B. to determine the type of transmission used in a data link

C. to determine the type of switching used in a data link.

D. to determine the flow of data






Answer: Option A

Explanation:



34. Synchronous protocols

A. transmit characters one at a time

B. allow faster transmission than asynchronous protocols do

C. are generally used by personal computers

D. are more reliable



35. To set up a bulletin board system you need

A. a smart modem with auto-answer capabilities

B. a telephone line

C. a personal computer

D. All of the above



36. Videotex is a combination of

A. television

B. communication

C. computer technology

D. All of the above



Answer: Option D

Explanation:







37. Which of the following frequency ranges is used for AM radio transmission?

A. Very Low Frequency : 3 kHz to 30 kHz


C. High Frequency : 3 MHz to 30 MHz

D. Very High Frequency : 30 MHz to 300 MHz



Answer: Option B

Explanation:



38. Baseband is

A. transmission of signals without modulation

B. a signal all of whose energy is contained within a finite frequency range

C. the simultaneous transmission of data to a number of stations

D. All of the above



Answer: Option A

Explanation:



39. A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. Differential PCM with 4 bit

relative signal value is used. Then how many bits per second are actually sent?

A. 32 Kbps

B. 64 Kbps







C. 8 Kbps

D. 128 Kbps.


Answer: Option A

Explanation:



40. X.21 is


B. a method access control technique for multiple-access transmission media

C. a very common bit-oriented data link protocol issued by ISO




Answer: Option D

Explanation:


41. What is the minimum number of wires required for sending data over a serial communications links?

A. 2

B. 1

C. 4

D. 3



Answer: Option A

Explanation:








42. In cyclic redundancy checking, the divisor is _____ the CRC.

A. the same size as

B. one bit less than

C. one bit more than

D. two bits more


Answer: Option C

Explanation:



43. Which command-line tool is included with every Microsoft TCP/IP client?

A. DHCP

B. WINS

C. PING

D. WINIPCFG



Answer: Option C

Explanation:



44. If odd parity is used for ASCII error detection, the number of 0s per eight-bit symbol is _____.

A. even B. odd

C. indeterminate D. 42


Answer: Option B

Explanation:








45. An error-detecting code inserted as a field in a block of data to be transmitted is known as

A. Frame check sequence

B. Error detecting code

C. Checksum

D. flow control


Answer: Option A

Explanation:


46. Number of bits per symbol used in Baudot code is

A. 1

B. 5

C. 8

D. 9



Answer: Option B

Explanation:



47. Working of the WAN generally involves

A. telephone lines

B. microwaves

C. satellites

D. All of the above







Answer: Option D

Explanation:



48. What does the acronym ISDN stand for?

A. Indian Standard Digital Network

B. Integrated Services Digital Network

C. Intelligent Services Digital Network

D. Integrated Services Data Network



Answer: Option B

Explanation:



49. Which of the following services dynamically resolves NetBIOS-to-IP resolution?

A. DNS

B. DHCP

C. WINS

D. LMHOSTS



Answer: Option C

Explanation:



50. An example of a medium-speed, switched communications service is







A. Series 1000

B. Dataphone 50

C. DDD

D. All of the above



Answer: Option C

Explanation:


1. A devices that links two homogeneous packet-broadcast local networks, is

A. gateway

B. repeater

C. bridge

D. hub



Answer: Option C

Explanation:



2. A computer that handles resource sharing and network management in a local area network. Select the best fit for answer:

A. Network Server



D. OSI


Answer: Option A

Explanation:






3. Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of

segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What

is the maximum number of repeaters that can be used?

A. Five B. Two

C. Four D. Six

E. Three


Answer: Option C

Explanation:



4. How much power (roughly) a light-emitting diode can couple into an optical fiber?

A. 100 microwatts

B. 440 microwatts

C. 100 picowatts

D. 10 milliwatts



Answer: Option A

Explanation:



5. A modem that is attached to the telephone system by jamming the phone's handset into two flexible receptacles in the

coupler?

A. gateway

B. bridge

C. acoustic coupler







D. time-division multiplexer



Answer: Option C

Explanation:


6. With telecommunications and a personal computer you can

A. "download" free public domain programs

B. send letters to be printed and delivered by the post office

C. order goods at a substantial discount

D. All of the above



Answer: Option D

Explanation:




A. Teleprinters are used for printing at remote locations, not for input.

B. Teleprinters are same as teletypes

C. Teleprinters are same as x400

D. Teleprinters have a printer for output and keyboard for input



Answer: Option D

Explanation:









A. 11110000

B. 00011110

C. 00001111

D. 11100000



Answer: Option D

Explanation:



9. What can cause a problem with communication with a client by name but not by IP address?

A. The IP address

B. Static files such as an LMHOSTS file or a DNS database

C. Subnet mask




Answer: Option B

Explanation:



10. Layer one of the OSI model is

A. physical layer

B. link layer

C. transport layer

D. network layer







Answer: Option A

Explanation:


11. What is the term used to describe addresses available on a DHCP server?

A. Pools

B. Scopes

C. Ranges

D. Notes



Answer: Option B

Explanation:



12. Which of the following signals is not standard RS - 232-C signal?

A. VDR

B. RTS

C. CTS

D. DSR



Answer: Option A

Explanation:



13. What is the default subnet mask for a class B network?






A. 127.0.01

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.0



Answer: Option C

Explanation:



14. Which of the following files is used for NetBIOS name resolution?

A. HOSTS

B. LMHOSTS

C. ARP

D. FQDN



Answer: Option B

Explanation:



15. In CRC the quotient at the sender

A. becomes the dividend at the receiver

B. becomes the divisor at the receiver

C. is discarded

D. is the remainder






Answer: Option C

Explanation:


16. How many pairs of stations can simultaneously communicate on Ethernet LAN?

A. 1

B. 2

C. 3

D. multiple



Answer: Option A

Explanation:



17. The OCR reading unit attached to a POS terminal is called a

A. light pen

B. wand

C. cursor

D. All of the above



Answer: Option B

Explanation:



18. A protocol is a set of rules governing a time sequence of events that must take place

A. between peers






B. between modems

C. between an interface

D. across an interface



Answer: Option A

Explanation:



19. The coming together of three technologies i.e. microelectronics, computing and communications has ushered in

A. information explosion

B. information technology

C. business revolution

D. educational upgradation



Answer: Option B

Explanation:



20. Terminals are used to

A. collect data from the physical system

B. provide information for the manager

C. communicate management decisions to the physical system

D. All of the above







Answer: Option D

Explanation:


21. Sales persons and other employees of the company who spend much of their time away from their offices but keep in

touch with their company's microcomputers or main frame computers over telephone lines are called

A. field workers

B. telecommuters

C. teleprocessors

D. company directors



Answer: Option B

Explanation:



22. What is the standard protocol for network management features?

A. SNA B. FTP

C. SNMP D. SMS


Answer: Option C

Explanation:



23. The application layer of a network

A. establishes, maintains, and terminates virtual circuits

B. defines the user's port into the network

C. consists of software being run on the computer connected to the network

D. All of the above








Answer: Option C

Explanation:



24. Brad is in charge of a small network and wants to make it simple but secure. The users want to have full control over their

data and still be able to share data with the rest of the office. The networking knowledge of the office staff is excellent.

Which network(s) would be the best to set up?

A. Peer-to-peer

B. Master domain

C. Server-based

D. Ethernet

E. Share-level


Answer: Option A

Explanation:



25. The simultaneous transmission of data to a number of stations is known as

A. broadcast

B. Band width

C. Aloha

D. Analog transmission



Answer: Option A

Explanation:







26. Most data communications involving telegraph lines use:

A. simplex lines

B. wideband channels

C. narrowband channels

D. dialed service



Answer: Option C

Explanation:



27. You have a network ID of 134.57.0.0 with 8 subnets. You need to allow the largest possible number of host IDs per subnet.

Which subnet mask should you assign?

A. 255.255.224.0 B. 255.255.240.0

C. 255.255.248.0 D. 255.255.252.0

E. 255.255.255.255


Answer: Option B

Explanation:



28. Modulation is the process of

A. sending a file from one computer to another computer

B. converting digital signals to analog signals

C. converting analog signals to digital signals

D. echoing every character that is received







Answer: Option B

Explanation:



29. Which multiplexing technique shifts each signal to a different carrier frequency?

A. FDM

B. synchronous TDM

C. asynchronous TDM

D. All of the above


Answer: Option A

Explanation:



30. Which of the following protocol is connection-oriented?

A. IPX B. UDP

C. NetBEUI D. TCP


Answer: Option D

Explanation:


31. The loss in signal power as light travels down the fiber is called

A. attenuation

B. propagation

C. scattering

D. interruption








Answer: Option A

Explanation:



32. Operating system functions may include

A. input/output control

B. virtual storage

C. multiprogramming

D. All of the above



Answer: Option D

Explanation:



33. Which layer of international standard organization's OSI model is responsible for creating and recognizing frame

boundaries?

A. physical layer

B. data link layer

C. transport layer

D. network layer



Answer: Option B

Explanation:









34. Which of the following might be used by a company to satisfy its growing communications needs?

A. front-end processor

B. multiplexer

C. controller

D. concentrator

E. All of the above


Answer: Option E

Explanation:



35. Different computers are connected to a LAN by a cable and a/an

A. modem

B. interface card

C. special wires

D. telephone lines



Answer: Option B

Explanation:


36. The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one

time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The

use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size?

Choose the best answer

A. An additional token is added for every 1,000 nodes

B. The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500

C. The network becomes less efficient

D.

After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful

Hyperstation Unified Bandwidth device




E. The network becomes more efficient


Answer: Option E

Explanation:



37. A characteristic of a multiprogramming system is:

A. simultaneous execution of program instructions from two applications

B. concurrent processing of two or more programs

C. multiple CPUs

D. All the above



Answer: Option B

Explanation:



38. When a host knows its physical address but not its IP address, it can use _____.

A. RARP

B. ARP

C. IGMP

D. ICMP



Answer: Option A

Explanation:








39. What is the name given to the exchange of control signals which is necessary for establishing a connection between a

modem and a computer at one end of a line and another modem and computer at the other end?

A. Handshaking

B. Modem options

C. Protocol

D. Duplexing



Answer: Option A

Explanation:



40. A communications medium that uses pulses of laser light in glass fibers. Select the best fit for answer:

A. Fiber optic cables

B. Cellular phone systems

C. Telecommunications processors

D. Telecommunications software


Answer: Option A

Explanation:


41. After you have verified that TCP/IP is installed correctly, what is the next step in verifying the TCP/IP configuration?

A. Ping the broadcast address

B. Ping the Microsoft Web site

C. Ping a distant router.

D. Ping the address of the local host







Answer: Option D

Explanation:



42. Which utility is useful for troubleshooting NetBIOS name resolution problems?

A. NBTSTAT

B. Netstat

C. PING

D. Hostname



Answer: Option A

Explanation:



43. The EIA-232 interface has _____ pins.

A. 20 B. 24

C. 25 D. 30


Answer: Option C

Explanation:



44. In OSI model, which of the following layer transforms information from machine format into that understandable by user

A. application

B. presentation

C. session







D. physical



Answer: Option B

Explanation:



45. The channel in the data communication model can be

A. postal mail service

B. telephone lines

C. radio signals

D. All of the above



Answer: Option D

Explanation:


46. Which of the following is an important characteristic of LAN?

A. application independent interfaces

B. unlimited expansion

C. low cost access for low bandwidth channels

D. parallel transmission



Answer: Option A

Explanation:








47. Which of the following is a wrong example of network layer:

A. Internet Protocol (IP) ARPANET

B. X. 25 Packet Level Protocol (PLP) - ISO

C. Source routing and Domain naming - Usenet

D. X.25 level 2 - ISO



Answer: Option D

Explanation:



48. A 2000-character text file has to be transmitted by using a 1,200 baud modem. Can you tell how long will it take?

A. 2 seconds

B. 20 seconds

C. 120 seconds

D. 12 seconds



Answer: Option B

Explanation:

1. Telecommunications networks come in a wide range of speed and capacity capabilities. Select the best fit for answer:




D. Extranets


Answer: Option A

Explanation:






A. characteristic of the hub architecture of ARC-net is alternative routing.

B. characteristic of LAN is unlimited expansion

C. characteristic of LAN is low cost access for low bandwidth channels

D. characteristic of the hub architecture of ARC-net is directionalized transmission



Answer: Option D

Explanation:



3. A modem is connected in between a telephone line and a

A. network

B. computer

C. communication adapter

D. serial port



Answer: Option C

Explanation:



4. What frequency range is used for TV transmission and low power microwave applications?

A. Very Low Frequency : 3 kHz to 30 kHz








C. Ultra High Frequency : 300 MHz to 3000 MHz

D. Super High Frequency : 3000 MHz to 30000 MHz



Answer: Option C

Explanation:




A.

Satellite transponders use a higher frequency for reception of radiation from earth stations and lower frequency

for transmission to earth stations.

B.

Satellite transponders contain a device that echos the radiation without change from one point on earth to

another

C.

Satellite transponder contain devices that transform the message sent from one location on earth to a different

code for transmission to another location

D.

satellite transponders us lower frequency reception of radiation from earth stations and higher frequency for

transmission to earth stations



Answer: Option A

Explanation:


6. We can receive data either through our television aerial or down our telephone lines and display this data on our television

screen. What is the general name given to this process?

A. Viewdata

B. Teletext

C. Telesoftware

D. Videotex



Answer: Option D




Explanation:



7. ASK, PSK, FSK, and QAM are examples of _____ encoding.

A. digital-to-digital B. digital-to-analog

C. analog-to-analog D. analog-to-digital


Answer: Option B

Explanation:



8. The data-link layer, in reference to the OSI model, specifies




D. All of the above



Answer: Option A

Explanation:



9. What function does a serial interface perform in data communication?

A. Converts serial data into audio signals

B. Converts analog signals into digital signals

C. Converts parallel data into a stream of bits

D. Decodes incoming signals into computer data









Answer: Option C

Explanation:



10. You need to determine whether IP information has been assigned to your Windows NT. Which utility should you use?

A. NBTSTAT B. NETSTAT

C. IPCONFIG D. WINIPCFG

E. PING


Answer: Option C

Explanation:


11. Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager.

If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?

A. 1 slots

B. 5 slots

C. 10 slots

D. 14 slots


Answer: Option B

Explanation:



12. When two computers communicate with each other, they send information back and forth. If they are separated by a

reasonable distance, they can send and receive the information through a direct cable connection which is called a null-

modem connection. Presently what is the maximum distance in metres permitted in this null-modem connection?

A. 80

B. 100






C. 30

D. 150



Answer: Option C

Explanation:



13. Modulation in which the two binary values are represented by two different amplitudes of the carrier frequency is known as

A. Amplitude-shift keying

B. Amplitude

C. Amplitude modulation

D. Aloha



Answer: Option A

Explanation:



14. You have been contracted to install a windows NT network in an office that is located in a strip mall. The office is located

next to the power plant of the building, so a UPS (uninterruptible power supply) has already been installed. What type of

cable should you use for the network cabling? Choose the best answer.

A. TI B. UTP

C. Fiber-optic D. PSTN

E. STP


Answer: Option E

Explanation:







15. Communication circuits that transmit data in both directions but not at the same time are operating in

A. a simplex mode

B. a half-duplex mode

C. a full-duplex mode

D. an asynchronous mode



Answer: Option B

Explanation:


16. In a synchronous modem, the digital-to-analog converter transmits signal to the

A. equalizer

B. modulator

C. demodulator

D. terminal



Answer: Option A

Explanation:



17. If the client receives an address from a DHCP server, what is the only information available in the Network Properties

dialog box?

A. The IP address

B. The subnet address

C. That the client is receiving its address from DHCP









Answer: Option C

Explanation:



18. An internetworking protocol that provides virtual circuit service across multiple X.25 protocol, is

A. X.75

B. X.25

C. X.400

D. X.21



Answer: Option A

Explanation:



19. Which of the following TCP/IP protocol is used for transferring files from one machine to another?

A. RARP

B. ARP

C. TCP

D. FTP



Answer: Option D

Explanation:







20. Which of the following is an example of bounded medium?

A. Coaxial cable

B. Wave guide

C. Fiber optic cable {d) All of the above

D. None of the above


Answer: Option D

Explanation:


21. Which transmission mode is used for data communication along telephone lines?

A. Parallel

B. Serial

C. Synchronous

D. Asynchronous



Answer: Option B

Explanation:



22. Who invented the modem?

A. Wang Laboratories Ltd.

B. AT & T Information Systems, USA

C. Apple Computers Inc.

D. Digital Equipment Corpn.








Answer: Option B

Explanation:



23. With an IP address starting at 200, you currently have 10 subnets. What subnet mask should you use to maximize the

number of available hosts?

A. 192 B. 224

C. 240 D. 248

E. 252


Answer: Option C

Explanation:



24. Which of the following communications modes support two-way traffic but in only one direction of a time?

A. simplex

B. half-duplex

C. three-quarters duplex

D. full-of the above



Answer: Option B

Explanation:



25. Which of the following TCP/IP internet protocol a diskless machine uses to obtain its IP address from a server?

A. RDP







B. RARP

C. RIP

D. X.25



Answer: Option B

Explanation:


26. In OSI network architecture, the dialogue control and token management are responsibilities of

A. session layer

B. network layer

C. transport layer

D. data link layer



Answer: Option A

Explanation:



27. Which of the following transmission systems provides the highest data rate to an individual device

A. Computer bus

B. Telephone lines

C. Voice band modem

D. leased lines



Answer: Option A

Explanation:






28. Which of the following connectivity devices is used to extend a network on a purely mechanical basis?

A. Gateway

B. Switch

C. Router

D. Active hub


Answer: Option D

Explanation:



29. The IEEE 802 project of the 1980s involved further defining the lower two layers of the OSI model. A number of standards

were agreed upon during that time. Which of the following is the standard for Ethernet?

A. 802.2 B. 802.3

C. 802.4 D. 802.5

E. 802.6


Answer: Option B

Explanation:



30. Which of the following digits are known as the terminal number of the Network User Address (NUA)?

A. 5-7

B. 1-4

C. 8-12

D. 13-14









Answer: Option C

Explanation:


31. Which of the following device is used with an X.25 network to provide service to asynchronous terminals

A. repeater

B. bridges

C. gateway

D. Packet assembler/disassemble



Answer: Option D

Explanation:



32. A medium access control technique for multiple access transmission media is

A. Aloha

B. Amplitude

C. Angle modulation

D. Attenuation



Answer: Option A

Explanation:



33. The core diameter of a single-mode fibers is about

A. 10 times the wavelength of the light carried in the fiber






B. 10 times the fiber radius

C. 7 times the light carried in the fiber

D. 3 times the wavelength of the light carried in the fiber



Answer: Option A

Explanation:



34. Which of the following TCP/IP protocol is used for remote terminal connection service?

A. TELNET

B. FTP

C. RARP

D. UDP



Answer: Option A

Explanation:



35. Networks where end user workstations are tied to LAN servers to share resources and application processing.






Answer: Option D





Explanation:


36. The frequency range : 300 kHz to 3 MHz is used for

A. AM radio transmission

B. FM radio transmission

C. TV transmission

D. microwave communications, satellite and radar



Answer: Option A

Explanation:



37. With an IP address of 201.142.23.12, what is your default subnet mask?

A. 0.0.0.0

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.0



Answer: Option D

Explanation:



38. A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate

instruction to the modem for this purpose?

A. Communications software

B. Error detecting protocols

C. Link access procedure (LAP)






D. Telecommunications



Answer: Option A

Explanation:



39. IEEE project 802 divides the data link layer into an upper _____ sublayer and a lower _____ sublayer.

A. HDLC, PDU

B. PDU, HDLC

C. MAC, LLC

D. LLC, MAC



Answer: Option D

Explanation:



40. Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions.

Which of the following events will always lead to an undeleted error?

A. one bit or any odd number of bits inverted in a block of data during transmission

B. two bits or any even number of bits inverted in a block during transmission

C. one bit or any odd number of bits inverted in a byte during transmission

D. two bits or any even number of bits inverted in a byte during transmission



Answer: Option D

Explanation:






41. Which utility is an all-purpose tool for troubleshooting TCP/IP problems?

A. NBTSTAT

B. Netstat

C. PING

D. Hostname



Answer: Option C

Explanation:



42. In communication satellite, multiple repeaters are known as

A. detector

B. modulator

C. stations

D. transponders



Answer: Option D

Explanation:






A. B. C. D. E. A - WordPress.com B. 192.168.10 C. 0.0.0.5 D. 51 E. None of the above Answer &...

Documents

Transcript of A. B. C. D. E. A - WordPress.com B. 192.168.10 C. 0.0.0.5 D. 51 E. None of the above Answer &...