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Ccna DsmbISP
Transcript of Ccna DsmbISP
Chapter 1
1. Which two things can be determined by using the ping command? (Choose two.)
the number of routers between the source and destination device
the IP address of the router nearest the destination device
the average time it takes a packet to reach the destination and for the response to return to the
source
whether or not the destination device is reachable through the network
the average time it takes each router in the path between source and destination to respond
2. What are three main types of high-bandwidth connection options used by medium- to
large-sized businesses? (Choose three.) DSL
cable modem
Ethernet
metro Ethernet
T1
T3
3. What is the maximum T1 transmission speed? 56 kbps
128 kbps
1.544 Mbps
2.4 Mbps
4. Which of the following start the test of destination reachability?
Echo request issued by source
echo reply issued by source
echo request issued by destination
echo reply issued by destination
5. Which statement describes a function of a Tier 1 ISP? peers with other similarly sized ISPs to form the global Internet backbone
uses the services of Tier 3 ISPs to connect to the global Internet backbone
pays Tier 2 ISPs for transit services to connect across continents
limits the offered services to small geographic areas
6. At which point do individuals and small businesses connect directly to the ISP network
to obtain Internet access? at a POP
at an IXP
at a Metro Ethernet link
on the ISP extranet
7.What information is contained in the numbered RFCs maintained by the IETF? the rules for acceptable use of websites and e-mail
the descriptions of various hardware components that connect to the Internet
the specifications and rules for how devices communicate over an IP network
the standards for cabling and wiring for local Ethernet networks
8. Which network support services team is responsible for testing a new customer
connection and for monitoring the ongoing operation of the link? customer service
help desk
network operations
on-site installation
9. Which network support services team identifies whether the client site has existing
network hardware and circuits installed? customer service
help desk
network operations
planning and provisioning
10. Which ISP network support systems team will typically contact the customer once a
new circuit is ready and guide the customer in setting up passwords and other account
information? help desk
customer service
network operations center
on-site installation team
planning and provisioning
11. What feature allows network devices to be scalable? a fixed number of interfaces
ease of repair
modularity
low maintenance requirements
low cost
12. Which command generated this output? 1 12.0.0.2 4 msec 4 msec 4 msec
2 23.0.0.3 20 msec 16 msec 16 msec
3 34.0.0.4 16 msec 18 msec 16 msec
Router# traceroute 34.0.0.4
Router# nslookup 34.0.0.4
Router# ping 34.0.0.4
Router# telnet 34.0.0.4
13. Which network utility helps determine the location of network problems and identifies
routers that packets travel across?
ping
ipconfig
traceroute
ixp
14. What interconnects the Internet backbone? gateway routers
IXPs
POPs
satellite dishes
15. What units are used to measure Internet bandwidth?
bits per second
bytes per second
hertz
megabytes per second
packets per second
16. The IT manager of a medium-sized business wishes to house the company-owned web
servers in a facility that offers round-the-clock controlled access, redundant power, and
high-bandwidth Internet access. Which ISP service will fulfill this need? web hosting
planning and provisioning
application hosting
equipment colocation
Tier 1 ISP services
17. What is the purpose of an RFC? to provide the connection point for multiple ISPs to the Internet
to document the development and approval of an Internet standard
to connect a business to an ISP
to provide data communication services to ISP customers
to monitor network performance and connection status of ISP clients
18. When did the Internet become available for use by businesses and consumers? 1979
1984
1991
1999
2000
19. What was the original purpose of the Internet? voice communication
marketing
research
commerce
20. What three support service teams are commonly found within an ISP? (Choose three.) help desk
computer support
application readiness
network operations center
planning and provisioning
implementation and documentation
Chapter 2
1. Which two functions are provided by the upper layers of the OSI model? (Choose two.) placing electrical signals on the medium for transmission
initiating the network communication process
encrypting and compressing data for transmission
segmenting and identifying data for reassembly at the destination
choosing the appropriate path for the data to take through the network
2. Which is a function of the transport layer of the OSI model? routes data between networks
converts data to bits for transmission
delivers data reliably across the network using TCP
formats and encodes data for transmission
transmits data to the next directly connected device
3. Which common Layer 1 problem can cause a user to lose connectivity?
incorrect subnet mask
incorrect default gateway
loose network cable
NIC improperly installed
4. Which three command line utilities are most commonly used to troubleshoot issues at
Layer 3? (Choose three.)
ping
a packet sniffer
Telnet
ipconfig
Traceroute
5. Which address is used by the router to direct a packet between networks? source MAC address
destination MAC address
source IP address
destination IP address
6. What is the correct encapsulation order when data is passed from Layer 1 up to Layer 4
of the OSI model? bits, frames, packets, segments
frames, bits, packets, segments
packets, frames, segments, bits
segments, packets, frames, bits
7. What are two goals of the ISP help desk? (Choose two.)
conserving support resources
network optimization
competitive scalability
customer retention
sales of network services
8. In what two ways do Level 1 and Level 2 help desk technicians attempt to solve a
customer‟s problems? (Choose three.) talking to the customer on the telephone
upgrading hardware and software
using various web tools
making an onsite visit
installing new equipment
with remote desktop sharing applications
9. A customer calls the help desk about setting up a new PC and cable modem and being
unable to access the Internet. What three questions would the technician ask if the bottom-
up troubleshooting approach is used? (Choose three.)
Is the NIC link light blinking?
What is the IP address and subnet mask?
Can the default gateway be successfully pinged?
Is the network cable properly attached to the modem?
Is the Category 5 cable properly connected to the network slot on the PC?
Can you access your e-mail account?
10. A customer calls to report a problem accessing an e-commerce web site. The help desk
technician begins troubleshooting using a top-down approach. Which question would the
technician ask the customer first?
Can you access other web sites?
Is there a firewall installed on your computer?
What is your IP address?
Is the link light lit on your NIC card?
11. Which statement describes the process of escalating a help desk trouble ticket? The help desk technican resolves the customer problem over the phone and closes the trouble
ticket.
Remote desktop utilities enable the help desk technician to fix a configuration error and close the
trouble ticket.
After trying unsuccessfully to fix a problem, the help desk technician sends the trouble ticket to
the onsite support staff.
When the problem is solved, all information is recorded on the trouble ticket for future reference.
12. What are two functions of the physical layer of the OSI model? (Choose two.) adding the hardware address
converting data to bits
encapsulating data into frames
signal generation
routing packets
13. A customer calls the ISP help desk after setting up a new PC with a cable modem but
being unable to access the Internet. After the help desk technician has verified Layer 1 and
Layer 2, what are three questions the help desk technician should ask the customer?
(Choose three.)
What is your subnet mask?
What is your IP address?
Is the NIC link light blinking?
Can you ping the default gateway?
Is the network cable properly attached to the cable modem?
Is the network cable correctly connected to the network port on the PC?
14. Which scenario represents a problem at Layer 4 of the OSI model? An incorrect IP address on the default gateway.
A bad subnet mask in the host IP configuration.
A firewall filtering traffic addressed to TCP port 25 on an email server.
An incorrect DNS server address being given out by DHCP.
15. What are two basic procedures of incident management? (Choose two.) opening a trouble ticket
using diagnostic tools to identify the problem
surveying network conditions for further analysis
configuring new equipment and software upgrades
adhering to a problem-solving strategy
e-mailing a problem resolution to the customer
16. Which level of support is supplied by an ISP when providing managed services?
Level 1
Level 2
Level 3
Level 4
17. What is the first step that is used by a help desk technician in a systematic approach to
helping a customer solve a problem?
identify and prioritize alternative solutions
isolate the cause of the problem
define the problem
select an evaluation process
18. A network technician has isolated a problem at the transport layer of the OSI model.
Which question would provide further information about the problem?
Do you have a firewall that is configured on your PC?
Do you have a link light on your network card?
Is your PC configured to obtain addressing information using DHCP?
What default gateway address is configured in your TCP/IP settings?
Can you ping http://www.cisco.com?
19. An ISP help desk technician receives a call from a customer who reports that no one at
their business can reach any websites, or get their e-mail. After testing the communication
line and finding everything fine, the technician instructs the customer to run nslookup
from the command prompt. What does the technician suspect is causing the customer‟s
problem?
improper IP address configuration on the host
hardware failure of the ISR used to connect the customer to the ISP
bad cables or connections at the customer site
failure of DNS to resolve names to IP addresses
20. Which layers of the OSI model are commonly referred to as the upper layers? application, presentation, session
application, session, network
presentation, transport, network
presentation, network, data link
session, transport, network
Chapter 3
1. Which two benefits can be gained by locating network equipment in a
telecommunications closet, rather than in a user area? (Choose two.) faster communication speeds
improved physical security
more resistant to hacker attempts
centralized cable management
less electrical usage
2. Which three issues should be noted on the technician‟s site survey report? (Choose
three.)
unlabeled cables
only two power outlets per wall in each room
poor physical security of network devices
horizontal cabling runs under 100 meters
lack of UPS for critical devices
two users sharing the same computer
3. Which two types of cable are used for initial router configuration? (Choose two.) serial cable
rollover cable
straight-through cable
crossover cable
patch cable
console cable
4. In addition to the inventory sheet, what other information about the hosts and
networking equipment should be documented by the on-site technician while performing
the site survey?
any obsolete office equipment being stored
all product keys for site license software
any planned growth anticipated in the near future
the memory requirements for installed application software
5. Refer to the exhibit. What type of device is used to connect two networks? hub
router
switch
access point
6. It is said that the goal for availability of a communications system is “five-9s”. What is
meant by this? A down time of .00001% is unacceptable.
A network needs to be available 99.999% of the time.
Five percent of all network expense covers 99% of user requirements.
The most critical time for network availability is from 9:00 to 5:00 p.m. five days a week.
The best time to do maintenance on a network is from 5:00 p.m. to 9:00 a.m. five days a week.
7. What three things are included in a logical topology document? (Choose three.) the location of cables, computers, and other peripherals
the path that the data takes through a network
the wireless signal coverage area
the wiring closet and access point locations
the device names and Layer 3 addressing information
the location of routing, network address translation, and firewall filtering
8. Which device has the ability to break up broadcast and collision domains? repeater
hub
router
switch
9. Why is it important to review the results of an on-site survey report with the customer
before beginning the network design? to inform the customer of how much time the upgrade will take
to discuss the implementation schedule for the new equipment
to verify that the report accurately describes the current network and any plans for expansion
to layout the new network design and discuss possible equipment upgrades and replacements
10. A client requires a networking device that is capable of expansion to suit growing
network demands. What type of device will suit this requirement? a networking device with ports that can be activated and deactivated
a networking device with a modular physical configuration
a networking device with the ability to be turned off remotely
a networking device with a cost per port that is as high as possible
11. What does the use of redundant network components supply to a network?
scalability
manageability
compatibility
reliability
12. What is the benefit for a company to use an ISR router? An ISR provides the functionality of a switch, router, and firewall in one device.
ISRs use a PC operating system for routing traffic, thus simplifying configuration and
management.
An ISR is immune to security attacks by hackers and so replaces all other network security
measures.
ISRs make routing decisions at OSI Layer 7, thus providing more intelligence to the network
than do other routers.
13. Which three items are typically found in an MDF? (Choose three.)
user workstations
switches and routers
fax machines
network equipment racks
the point of presence
copier
14. What are two advantages of having ISP-managed services? (Choose two.) does not require leasing costs for service
can guarantee up to 99.999% availability
eliminates the need for data backup
increases availability of help desk services
does not require a Service Level Agreement
15. A manufacturing company is in the process of a network upgrade. Which two
statements are true about the phases of the upgrade process? (Choose two.)
Phase 1 is used to determine network requirements.
Phase 2 includes creating an analysis report.
Phase 3 is based on an implementation schedule that allows extra time for unexpected events.
Phase 4 is where prototypes are created and tested.
Phase 5 includes identifying and addressing any weaknesses in the design.
16. When designing a network upgrade, which two tasks should the onsite technician
perform? (Choose two.)
configure the servers and routers prior to delivery
upgrade the network operating system and all client operating systems
investigate and document the physical layout of the premises
document the final design for approval by the customer
perform a site survey to document the existing network structure
17. What is the term for the location at the customer premise where the customer network
physically connects to the Internet through a telecommunications service provider? backbone area
point of presence
network distribution facility
intermediate distribution frame
18. Refer to the exhibit. Which type of twisted pair cable is used between each device? A=console, B=straight, C=crossover, D= crossover, E=straight
A=straight, B=straight, C=straight, D=crossover, E=console
A=crossover, B=straight, C=straight, D=crossover, E=crossover
A=console, B=straight, C=straight, D=crossover, E=crossover
A=console, B=crossover, C=crossover, D=straight, E=straight
19. In what two ways will entering into a managed service agreement with an ISP for a
network upgrade affect the costs that are incurred by the customer? (Choose two.)
Customer IT training costs will increase to enable operation of the new equipment.
The cost of hardware repairs and support will become the responsibility of the customer.
Network upgrade and maintenance costs will become predictable.
Staffing costs will increase because the customer will need to hire additional IT staff to complete
the upgrade.
The company will not need to spend a large amount of money to purchase the equipment
upfront.
20. Which type of cable has a solid copper core with several protective layers including
PVC, braided wire shielding, and a plastic covering?
STP
UTP
coaxial
fiber optic
21. What must be added when a network expands beyond the coverage area of the current
telecommunications room?
MDF
POP
IDF
IXP
Chapter 4
1. In an 8 bit binary number, what is the total number of combinations of the eight bits?
128
254
255
256
512
1024
2. Convert the decimal number 231 into its binary equivalent. Select the correct answer
from the list below. 11110010
11011011
11110110
11100111
11100101
11101110
3. How many usable hosts are available given a Class C IP address with the default subnet
mask?
254
255
256
510
511
512
4. Which statement describes NAT overload or PAT? Each internal address is dynamically translated to an individual external IP address.
A single internal address is always translated to the same unique external IP address.
Many internal addresses can be translated to a single IP address using different port assignments.
Many internal addresses are statically assigned a single IP address and port to use for
communications.
5. Which IPv4 class of addresses provides the most networks? Class A
Class B
Class C
Class D
Class E
6. Which statement accurately describes public IP addresses? Public addresses cannot be used within a private network.
Public IP addresses must be unique across the entire Internet.
Public addresses can be duplicated only within a local network.
Public IP addresses are only required to be unique within the local network.
Network administrators are free to select any public addresses to use for network devices that
access the Internet.
7. Which two statements describe classful IP addresses? (Choose two.) It is possible to determine which class an address belongs to by reading the first bit.
The number of bits used to identify the hosts is fixed by the class of the network.
Only Class A addresses can be represented by high-order bits 100.
Up to 24 bits can make up the host portion of a Class C address.
Up to 24 bits can be used to identify unique networks.
Three of the five classes of addresses are reserved for multicasts and experimental use.
8. Company XYZ uses a network address of 192.168.4.0. It uses the mask of
255.255.255.224 to create subnets. What is the maximum number of usable hosts in each
subnet? 6
14
30
62
9. hat is the network broadcast address for a Class C address of 192.168.32.0 with the
default subnet mask? 192.168.0.0
192.168.0.255
192.168.32.0
192.168.32.254
192.168.32.255
10. Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any
resources on the Internet. The configuration of the host is shown in the exhibit. What could
be the cause of the problem? The host subnet mask is incorrect.
The default gateway is a network address.
The default gateway is a broadcast address.
The default gateway is on a different subnet from the host.
11. IPv6 increases the IP address size from 32 bits to how many bits?
64
96
128
192
256
512
12. What is the range of the first octet in a Class B address?
127 to 191
127 to 192
128 to 191
128 to 192
13. Which IPv4 class provides the highest number of host addresses per network? Class A
Class B
Class C
Class D
Class E
14. refer to the exhibit. Which range of IP addresses would allow hosts that are connected
to the Router1 Fa0/0 interface to access outside networks? 192.168.1.0 through 192.168.1.95
192.168.1.66 through 192.168.1.94
192.168.1.66 through 192.168.1.96
192.168.1.0 through 192.168.1.127
192.168.1.66 through 192.168.1.128
15 Which option shows the proper notation for an IPv6 address? 2001,0db8,3c55,0015,abcd,ff13
2001-0db8-3c55-0015-abcd-ff13
2001.0db8.3c55.0015.abcd.ff13
2001:0db8:3c55:0015::abcd:ff13
16. What are two reasons that NAT was developed? (Choose two.) to preserve registered public IP addresses
to allow users on the public Internet to access local networks
to provide a method for privately addressed LANs to participate in the Internet
to make routing protocols operate more efficiently
to allow private addresses to be routed on the public Internet
to reduce overhead and CPU usage on gateway routers
17. What must happen for a privately addressed host on an inside local network to be able
to communicate with an outside destination host on the Internet? The host IP address must be translated to an outside private address.
The host IP address must be translated to an inside local address.
The host IP address must be translated to an outside local address.
The host IP address must be translated to an inside global address.
18. Which port numbers are used by PAT to create unique global addresses? 255 and below
1024 and below
1025 and above
64,000 and above
19. Static NAT works by mapping a specific inside local IP address to what other specific
address type? inside global
outside local
outside global
private IP address
20. What are three advantages of NAT implementations? (Choose three.)
improved security
improved router performance
decreased processor load
improved scalability
universal application compatibility
sharing few public IP addresses with many hosts
21. Refer to the exhibit. R1 is performing NAT for the 10.1.1.0/24 inside network. HostA
has sent a request to the web server. What is the destination IP address of the return
packet from the web server?
10.1.1.2
172.30.20.1
172.30.20.10
192.168.1.1
Chapter 5
1. In what two ways does SDM differ from the IOS CLI? (Choose two.)
SDM is used for in-band management only. The IOS CLI can be used for in-band and out-of-
band management.
SDM is accessed through a Telnet application. The IOS CLI is accessed through a web browser.
SDM is available for all router platforms. The IOS CLI is available for a limited number of Cisco
devices.
SDM utilizes GUI buttons and text boxes. The IOS CLI requires the use of text-based
commands.
SDM is used for advanced configuration tasks. The IOS CLI is preferred for initial basic device
configuration.
2. Which mode will a configured router display at login?
global configuration mode
setup mode
ROM monitor mode
user EXEC mode
3. Refer to the exhibit. Which password or passwords will be encrypted as a result of the
configuration that is shown?
virtual terminal only
enable mode only
console and virtual terminal only
enable mode and virtual terminal
only the service password
all configured passwords
4. Refer to the exhibit. Which three sets of commands are required to enable
administrators to connect to the Switch1 console over Telnet for configuration and
management? (Choose three.)
Switch1(config)# interface fa0/1
Switch1(config-if)# ip address 192.168.2.64 255.255.255.192
Switch1(config)# interface fa0/1
Switch1(config-if)# ip address 192.168.2.66 255.255.255.192
Switch1(config)# interface vlan 1
Switch1(config-if)# ip address 192.168.2.126 255.255.255.192
Switch1(config-if)# no shutdown
Switch1(config)# line vty 0 4
Switch1(config-line)# enable password cisco
Switch1(config-line)# login
Switch1(config)# line vty 0 15
Switch1(config-line)# password cisco
Switch1(config-line)# login
Switch1(config)# ip default-gateway 192.168.2.65
5. How does the SYST LED on the catalyst 2960 switch indicate a POST failure? blinks rapidly amber
blinks rapidly green
steady amber
steady green
6. Refer to the exhibit. A company always uses the last valid IP address in a subnetwork as
the IP address of the router LAN interface. A network administrator is using a laptop to
configure switch X with a default gateway. Assuming that the switch IP address is
192.168.5.147/24, what command will the administrator use to assign a default gateway to
the switch? X(config)# ip default-gateway 192.168.5.254
X(config)# ip gateway 192.168.5.1
X(config)# ip route 0.0.0.0 0.0.0.0 192.168.5.1
X(config)# ip default-route 192.168.5.1
X(config)# ip route 192.168.5.254 255.255.255.0 fastethernet 0/0
7. A technician has made changes to the configuration of a router. What command will
allow the technician to view the current configuration before he saves the changes? router# show running-config
router# show startup-config
router# show flash
router# show version
8. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes
and interfaces that can be protected with passwords. (Choose three.) VTY interface
console interface
Ethernet interface
secret EXEC mode
privileged EXEC mode
router configuration mode
9. To save time, IOS commands may be partially entered and then completed by typing
which key or key combination?
Tab
Ctrl-P
Ctrl-N
Up Arrow
Right Arrow
Down Arrow
10. What is the correct command sequence to configure a router host name to „LAB_A‟? Router> enable
Router# configure terminal
Router(config)# hostname LAB_A
Router> enable
Router# hostname LAB_A
Router> enable
Router# configure router
Router(config)# hostname LAB_A
Router> enable
Router(config)# host name LAB_A
11. Refer to the exhibit. From the router console, an administrator is unable to ping a
Catalyst switch that is located in another building. What can the administrator do from her
location to check the IP configuration of the attached switch?
Open an SDM session with the switch from her desktop.
Telnet to the switch from the router console.
Use the show cdp neighbors detail command from the router console.
The administrator must go to the switch location and make a console connection to check these
settings.
12. Which two options must be selected in SDM Express to enable a router serial interface
to obtain an IP address automatically? (Choose two.) Easy IP (IP negotiated)
IP unnumbered
No IP address
HDLC encapsulation
Frame Relay encapsulation
PPP encapsulation
13. What three settings can be made in the SDM Express basic configuration screen?
(Choose three.)
host name
DHCP options
domain name
interface IP addresses
enable secret password
DNS server IP addresses
14. Which tasks can be accomplished by using the command history feature? (Choose two.) View a list of commands entered in a previous session.
Recall up to 15 command lines by default.
Set the command history buffer size.
Recall previously entered commands.
Save command lines in a log file for future reference.
15. What option within Cisco SDM Express must be configured to allow hosts that receive
IP address settings from the router to resolve names on the network or Internet? host name
domain name
DHCP address pool
DNS server IP address
16. Which three encapsulation types can be set on a serial interface by an administrator
who is using SDM Express? (Choose three.) ATM
CHAP
Frame Relay
HDLC
PAP
PPP
17. Which command will display routing table information about all known networks and
subnetworks? Router# show ip interfaces
Router# show ip connections
Router# show ip route
Router# show ip networks
18. A network administrator needs to configure a router. Which of the following
connection methods requires network functionality to be accessible?
console
AUX
Telnet
modem
19. Which three pieces of information about a neighbor device can be obtained by the show
cdp neighbors command? (Choose three.)
platform
routing protocol
connected interface of neighbor device
device ID
IP addresses of all interfaces
enable mode password
20. Which function is a unique responsibility of the DCE devices shown in the exhibit?
transmission of data
reception of data
clocking for the synchronous link
noise cancellation in transmitted data
21. Which of the following are functions of NVRAM? (Choose two.) stores the routing table
retains contents when power is removed
stores the startup configuration file
contains the running configuration file
stores the ARP table
22. Refer to the exhibit. Which series of commands will enable users who are attached to
Router1 to access the remote server? Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.129 255.255.255.252
Router1(config-if)# clock rate 64000
Router1(config-if)# no shutdown
Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.125 255.255.255.252
Router1(config-if)# no shutdown
Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.125 255.255.255.252
Router1(config-if)# clock rate 64000
Router1(config-if)# no shutdown
Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.129 255.255.255.252
Router1(config-if)# no shutdown
23. A network technician is attempting to add an older workstation to a Cisco switched
LAN. The technician has manually configured the workstation to full-duplex mode in order
to enhance the network performance of the workstation. However, when the device is
attached to the network, performance degrades and excess collision are detected. What is
the cause of this problem?
The host is configured in a different subnet from the subnet of the switch.
There is a duplex mismatch between the workstation and switch port.
The switch port is running at a different speed from the speed of the workstation NIC.
The host has been configured with a default gateway that is different from that of the switch.
24. Which of the following statements are true regarding the user EXEC mode? (Choose
two.) All router commands are available.
Global configuration mode can be accessed by entering the enable command.
A password can be entered to allow access to other modes.
Interfaces and routing protocols can be configured.
Only some aspects of the router configuration can be viewed.
25. Which command turns on a router interface? Router(config-if)# enable
Router(config-if)# no down
Router(config-if)# s0 active
Router(config-if)# interface up
Router(config-if)# no shutdown
26. A router has a valid operating system and a configuration stored in NVRAM. When the
router boots up, which mode will display? global configuration mode
setup mode
ROM monitor mode
user EXEC mode
27. Which two statements are true about the NVRAM on a Cisco device?(Choose two.) stores the routing table
retains contents when power is removed
stores the startup configuration file
contains the running configuration file
stores the ARP table
28. An administrator enters the show ip route command into a router. What type of
information will be displayed?
the current configuration stored in RAM
the networks learned from other neighbors
the encapsulation and bandwidth of every interface
the private IP addresses translated to public IP addresses
29. When utilizing SDM Express, which two configuration options allow a router serial
interface to obtain an IP address without manually configuring it? (Choose two.)
Static IP Address
Frame Relay encapsulation
IP Negotiated
HDLC encapsulation
IP Unnumbered
30. Refer to the exhibit. Based on the output of the show port-security interface
fastethernet0/1
command on the switch, which statement about the switch port is true? The port has been shut down.
Only three unique MAC addresses are permitted to use this port.
There are ten devices with different MAC addresses connected to this port.
Port security has been violated seven times on this port.
31. Refer to the exhibit. Users on both SW1 and SW2 report that they are unable to
communicate with each other. A network administrator issues show ip interface brief
commands on both routers to troubleshoot the connectivity between the two networks.
What action will correct the connectivity issue?
Configure a default route on router RA pointing to router RB.
Modify the network address of the serial link from a /30 to a /24.
Issue a clock rate command on the s0/0/0 interface on router RA.
Issue a no shutdown command on the s0/0/0 interface on router RB.
Issue a debug ip rip on both routers to verify that the routing protocol is functioningproperly.
32. Refer to the exhibit. A company always uses the last valid IP address in a subnetwork
as the IP address of the router LAN interface. A network administrator is using a laptop to
configure switch X with a default gateway via the switch console port. The switch VLAN 1
interface is assigned IP address 192.168.5.68/26. What command will the administrator use
to assign a default gateway to the switch?
X(config)# ip default-gateway 192.168.5.1
X(config)# ip default-gateway 192.168.5.126
X(config)# ip default-gateway 192.168.5.190
X(config)# ip route 0.0.0.0 0.0.0.0 192.168.5.192
X(config)# ip route 192.168.5.0 255.255.255.192 192.168.5.1
33. What step must be completed before port security can be enabled on an interface? The interface must be shut down.
The interface must be in access mode.
The maximum number of MAC addresses must be configured.
The violation mode must be configured.
34. Which of the following identifies the correct items needed to initially configure a
router? 1) DB-9-to-RJ-45 on the PC’s serial port
2) a straight through cable
3) the router’s console port
1) PC’s Ethernet port
2) a crossover cable
3) the router’s Ethernet port
1) DB-9-to-RJ-45 on the PC’s serial port
2) a rollover cable
3) the router’s Ethernet port
1) PC’s Ethernet port
2) a rollover cable
3) the router’s console port
1) DB-9-to-RJ-45 on the PC’s serial port
2) a rollover cable
3) the router’s console port
1) PC’s Ethernet port
2) a rollover cable
3) the router’s Ethernet port
Chapter 6
1. Which command is used to view the RIP routing protocol settings and configuration? show version
show ip route
show interface
show ip protocols
2. Refer to the exhibit. What is the maximum number of RIP routers that could separate
HostA and HostB and still leave the hosts with connectivity to each other?
14
15
16
17
3. In which situation would a company register for its own autonomous system number
(ASN)?
when the company’s ISP adds connection points to the Internet
when additional routers are added to the corporate internetwork
when more than one interior routing protocol is used
when the company uses two or more ISPs
4. Consider this routing table entry
R 172.16.1.0/24 [120/1] via 200.1.1.1 00:00:27 Serial0/1
What type of route is this?
a static route
a default route
a RIP route
an OSPF route
an EIGRP route
a directly-connected route
5. What is the difference between interior and exterior routing protocols? Exterior routing protocols are only used by large ISPs. Interior routing protocols are used by
small ISPs.
Interior routing protocols are used to route on the Internet. Exterior routing protocols are used
inside organizations.
Exterior routing protocols are used to administer a single autonomous system. Interior routing
protocols are used to administer several domains.
Interior routing protocols are used to communicate within a single autonomous system. Exterior
routing protocols are used to communicate between multiple autonomous systems.
6. What information is included in RIPv2 routing updates that is not included in RIPv1
updates? metric
subnet mask
area identification
hop count
autonomous system number
7. Which routing protocol is used to exchange data between two different ISPs? BGP
EIGRP
OSPF
RIP v2
8. Refer to the exhibit. Which configuration command or commands contributed to the
output that is shown? routerA(config-router)# no version 2
routerA(config)# interface fa0/0
routerA(config-if)# ip address 172.19.0.0 255.255.0.0
routerA(config-router)# network 192.168.3.0
routerA(config)# no ip default-gateway
9. Refer to the exhibit. If all routers are running RIP and network 10.0.0.0 goes down,
when will R3 learn that the network is no longer available? in 30 seconds
in 60 seconds
in 90 seconds
Immediately
10. What statement is true regarding an AS number? AS numbers are controlled and registered for Internet use.
Interior routing protocols require registered AS numbers.
ISPs require all customers to have registered AS numbers.
All routers at an ISP must be assigned the same AS number.
11. What is the purpose of the network command used when configuring RIP? to specify whether RIPv1 or RIPv2 will be used as the routing protocol
to allow the router to monitor RIP updates that occur on other routers
to identify which networks on the router will send and receive RIP updates
to configure the IP address on an interface that will use RIP
to identify all of the remote networks that should be reachable from the router
12. Which command would a network administrator use to determine if the routers in an
enterprise have learned about a newly added network?
router# show ip address
router# show ip route
router# show ip networks
router# show ip interface brief
router# debug ip protocol
router# debug rip update
13. What is the purpose of a routing protocol? It is used to build and maintain ARP tables.
It provides a method for segmenting and reassembling data packets.
It allows an administrator to devise an addressing scheme for the network.
It allows a router to share information about known networks with other routers.
It provides a procedure for encoding and decoding data into bits for packet forwarding.
14. What device enables an ISP to connect with other ISPs to transfer data? border gateway router
DSLAM
web server
interior router
15. Which command will display RIP routing updates as they are sent and received?
show ip route
show ip rip
debug ip rip
show ip protocols
show ip rip database
16. Which part of an IP packet does the router use to make routing decisions?
source IP address
source MAC address
destination IP address
destination MAC address
17. What two types of businesses would benefit from registering as their own autonomous
systems? (Choose two.) a home business with one ISP connection
a global business with connections to multiple local ISPs
a medium-sized nationwide business with Internet connectivity through different ISPs
a large enterprise with two connections to the same ISP
a small ISP with a single Internet connection through a larger ISP
18. Which command will display RIP activity as it occurs on a router? debug ip rip
show ip route
show ip interface
show ip protocols
debug ip rip config
show ip rip database
19. Why is fast convergence desirable in networks that use dynamic routing protocols? Routers will not allow packets to be forwarded until the network has converged.
Hosts are unable to access their gateway until the network has converged.
Routers may make incorrect forwarding decisions until the network has converged.
Routers will not allow configuration changes to be made until the network has converged.
20. Which two statements describe static routes? (Choose two.) They are created in interface configuration mode.
They require manual reconfiguration to accommodate network changes.
They automatically become the default gateway of the router.
They are identified in the routing table with the prefix S
They are automatically updated whenever an interface is reconfigured or shutdown.
21. Which two statements or sets of statements describe differences between link-state and
distance vector routing protocols? (Choose two.) Link-state routing protocols routinely use more bandwidth for updates than do distance vector
routing protocols.
Distance vector routing protocols update all routers at one time. Link-state routing protocols
update one router at a time.
Link-state routers only know about directly connected routers. Distance vector routers know
about every router in the network.
Link-state routing protocols update when a change is made. A network using distance vector
routing protocols only updates at a specific interval.
Distance vector routing protocols have limited information about the entire network. Link state
routing protocols know about all routers in the network.
In case of similar topologies, networks using link-state routing protocols typically converge more
rapidly than do networks using distance vector routing protocols.
22. Which protocol is an exterior routing protocol? BGP
EIGRP
OSPF
RIP
23. Hosts on two separate subnets cannot communicate. The network administrator
suspects a missing route in one of the routing tables. Which three commands can be used to
help troubleshoot Layer 3 connectivity issues? (Choose three.) Ping
show arp
Traceroute
show ip route
show interface
show cdp neighbor detail
24. What term refers to a group of networks that uses the same internal routing policies
and is controlled by a single administrative authority?
Internet
intranet
virtual private network
autonomous system
25. Refer to the exhibit. All of the routers are running RIP. There are two paths from
router A to the 192.168.3.0 network. Based on the output of the show ip route command on
router A, which route was entered into the routing table and why? A,B,C,D because it has the lowest administrative distance
A,E,F,G,D because it has the lowest administrative distance
A,B,C,D because it has the lowest metric
A,E,F,G,D because it has the lowest metric
26. A network is converged and the routing tables are complete. When a packet needs to be
forwarded, what is the first criterion used to determine the best path in the routing table?
the route with the highest bandwidth
the route with the smallest administrative distance
the route with the longest address and mask match to the destination
the route with the best combination of administrative distance and lowest cost
27. Refer to the exhibit. If connectivity between the two hosts is maintained, what is the
maximum number of RIP routers that can be in the path from HostA to HostB?
14
15
16
17
28. What is the purpose of the network command in configuring RIP? to specify whether RIPv1 or RIPv2 will be used as the routing protocol
to allow the router to monitor RIP updates that occur on other routers
to identify the directly connected networks that will be announced in RIP updates
to configure the IP address on an interface that will use RIP
to identify all of the remote networks that should be reachable from the router
29. Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97.
What willrouter B do? drop the packet
use the default route
forward the packet via the route to 10.16.1.0
forward the packet via the route to 10.16.1.64
Chapter 7
1. Which two statements are true about the OSI and TCP/IP models? (Choose two.)
The two bottom layers of the TCP/IP model make up the bottom layer of the OSI model.
The TCP/IP model is a theoretical model and the OSI model is based on actual protocols.
The OSI network layer is comparable to the Internet layer of the TCP/IP model.
The TCP/IP model specifies protocols for the physical network interconnection.
The TCP/IP model is based on four layers and the OSI model is based on seven layers.
2. To meet customer expectations, an ISP must guarantee a level of service that is based on
what two factors? (Choose two.)
accessibility
adaptability
availability
reliability
scalability
3. User1 is sending an e-mail to [email protected]. What are two characteristics of the
process of sending this data? (Choose two.) It utilizes TCP port 110.
A TCP connection is established directly between the User1 and User2 client computers in order
to send the e-mail message.
It utilizes a store and forward process.
The same application layer protocol is used to send the e-mail and retrieve it from the destination
server.
SMTP is used to send the e-mail message to the mail servers.
4. Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1
has sent a SYN message to begin session establishment. What happens next? Host1 sends an ACK message to Host2.
Host1 sends a SYN message to Host2.
Host1 sends a SYN-ACK message to Host2.
Host2 sends an ACK message to Host1.
Host2 sends a SYN message to Host1.
Host2 sends a SYN-ACK message to Host1.
5. What are three characteristics of network reliability? (Choose three.) Redundant hardware provides enhanced reliability.
Reliability is measured as a percent.
Reliability is the responsibility of the ISP customers.
Fault tolerance is a measure of reliability.
The longer the MTBF, the greater the reliability.
6. Which two statements describe the FTP protocol? (Choose two.) It uses well-known port 23.
The protocol interpreter is responsible for the data transfer function.
In passive data connections, the FTP client initiates the transfer of data.
It requires two connections between client and server.
FTP servers open a well-known port on the client machine.
7. What is the function of the TCP three-way handshake? It enables the synchronization of port numbers between source and destination hosts.
It immediately triggers the retransmission of lost data.
It synchronizes both ends of a connection by allowing both sides to agree upon initial sequence
numbers.
It identifies the destination application on the receiving host.
8. What are three characteristics of HTTPS? (Choose three.) It uses a different client request-server response process than HTTP uses.
It specifies additional rules for passing data between the application and data link layers.
It supports authentication.
It allows more simultaneous connections than HTTP allows.
It encrypts packets with SSL.
It requires additional server processing time.
9. Which DNS zone resolves an IP address to a qualified domain name? dynamic lookup
forward lookup
resolution lookup
reverse lookup
10. What type of update allows client computers to register and update their resource
records with a DNS server whenever changes occur? dynamic
zone transfer
local recursive query
root domain query
top-level domain query
11. Refer to the exhibit. Which two statements are true about this file? (Choose two.) If the gateway address changes, the file will be updated dynamically.
The command ping fileserv will use IP address 172.16.5.10.
If the ping http://www.cisco.com command is issued, the file will be checked for the Cisco web
server IP address before DNS is queried.
The file must be created by the user if it is to be used by a workstation.
Name to IP address mappings are added to the file after they are received from DNS.
12. Which two tasks are the responsibility of the local DNS server? (Choose two.) maintaining a large number of cached DNS entries
maintaining the ISP server
mapping name-to-IP addresses for internal hosts
forwarding name resolution requests to a caching-only server
forwarding all name resolution requests to root servers on the Internet
13. What are three unique characteristics of UDP? (Choose three.) connection oriented
full-duplex operation
low overhead
no flow control
no error-recovery function
reliable transmission
14. A manufacturing company is looking into subscribing to services from a new ISP. The
company requires hosted world wide web, file transfer, and e-mail services. Which three
protocols represent the key application services that are required by the company? (Choose
three.) FTP
HTTP
ICMP
PPP
Telnet
SMTP
15. Which two options correctly match protocol and well-known port number? (Choose
two.) DNS – 25
FTP – 110
HTTP – 80
POP3 – 25
SMTP – 25
16. Within TCP, what combination makes up a socket pair?
source port with destination port
source IP address with destination port
source IP address and destination IP address
source IP address and port with a destination IP address and port
17. Which protocol is used to send e-mail, either from a client to a server or from a server
to another server?
SNMP
FTP
SMTP
HTTPS
18. Refer to the exhibit. The PC is requesting HTTP data from the server. What is a valid
representation of source and destination sockets for this request?
Source – 192.168.1.17:80 ; Destination – 192.168.2.39:80
Source – 192.168.1.17:80 ; Destination – 192.168.2.39:1045
Source – 192.168.1.17:1045 ; Destination – 192.168.2.39:80
Source – 192.168.1.17:1045 ; Destination – 192.168.2.39:1061
19. What type of DNS server is typically maintained by an ISP? caching-only
root
second-level
top-level
20. A client is communicating with a server on a different segment of the network. How
does the server determine what service is being requested by the client? The server will apply the default service configured in directory services.
The server will use ARP to discover the appropriate service from the local router.
The server will send a request to the client asking for the appropriate service.
The server will determine the appropriate service from the destination port field.
21. When a host is communicating with multiple applications on the same server at the
same time, which of the following will have the same value for each session? (Choose two.)
21. When a host is communicating with multiple applications on the same server at the
same time, which two values will likely be the same in all packets for each session? (Choose
two.) IP address
MAC address
session number
sequence number
22. Which three fields do a TCP header and UDP header have in common? (Choose three.) checksum
destination port
source port
23. Which three fields do a TCP header and a UDP header have in common? (Choose
three.) source portwindow
checksum
destination port
acknowledgment number
sequence number
24. A manufacturing company subscribes to certain hosted services from their ISP. The
services require include hosted world wide web, file transfer, and e-mail. Which protocols
represent these three key applications? (Choose three.) FTP
HTTP
DNS
SNMP
DHCP
SMTP
Chapter 8
1. Which AAA service reduces IT operating costs by providing detailed reporting and
monitoring of network user behavior, and also by keeping a record of every access
connection and device configuration change across the network?
Which AAA service provides detailed reporting and monitoring of network user behavior,
and also keeps a record of every access connection and device configuration change across
the network? authentication
accreditation
accounting
authorization
2. Which three items are normally included when a log message is generated by a syslog
client and forwarded to a syslog server? (Choose three.) date and time of message
ID of sending device
length of message
message ID
checksum field
community ID
3. What is the advantage of using WPA to secure a wireless network?
It uses a 128-bit pre-shared hexadecimal key to prevent unauthorized wireless access.
It uses an advanced encryption key that is never transmitted between host and access point.
It is supported on older wireless hardware, thus providing maximum compatibility with
enterprise equipment.
It requires the MAC address of a network device that is requesting wireless access to be on a list
of approved MAC addresses.
4. A company wants to configure a firewall to monitor all channels of communication and
allow only traffic that is part of a known connection. Which firewall configuration should
be deployed? packet filtering
proxy
stateful packet inspection
stateless packet inspection
5. A server log includes this entry: User student accessed host server ABC using Telnet
yesterday for 10 minutes. What type of log entry is this? authentication
authorization
accounting
accessing
6. What two measures help to verify that server backups have been reliably completed?
(Choose two.)
reviewing backup logs
performing trial backups
performing full backups only
replacing tape backup with hard disk-based backup
using an autoloader when backups require more than one tape
7. Which means of communication does an SNMP network agent use to provide a network
management station with important but unsolicited information? query
broadcast
ICMP ping
trap
poll
8. Which three protocols are used for in-band management? (Choose three.)
8. Which three applications can be used for in-band management? (Choose three.) FTP
HTTP
SNMP
Telnet
TFTP
DHCP
9. A hacker has gained access to sensitive network files. In analyzing the attack, it is found
that the hacker gained access over a wireless segment of the network. It is further
discovered that the only security measure in place on the wireless network is MAC Address
Filtering. How is it likely that the hacker gained access to the network? The hacker used a software tool to crack the shared hexadecimal wireless key.
The hacker obtained the MAC address of a permitted host, and cloned it on his wireless laptop
NIC.
The attacker mounted a denial of service attack to overwhelm the firewall before penetrating the
wireless LAN.
The hacker gained wireless access to the MAC address database and added his own MAC
address to the list of permitted addresses.
10. A network administrator is assigning network permissions to new groups of users and
employing the principle of least privilege. Which two actions should the administrator
take? (Choose two.)
Provide users with only the access to resources required to do their jobs.
Provide the minimum level of permissions required for users to do their jobs.
Remove all permissions from the users and grant permissions as they are requested.
Allow users to decide how much permission they need to accomplish their job tasks.
Provide full access to the users and gradually remove privileges over time.
11. Which three protocols describe methods that can be used to secure user data for
transmission across the internet? (Choose three.)
SMTP
IPSEC
SSL
HTTPS
FTP
TFTP
12. Which benefit does SSH offer over Telnet when remotely managing a router? encryption
TCP usage
authorization
connection using six VTY lines
13. Which of the following does SNMP use to hold information collected about the
network?
network management station
network management database
management information base
database information agent
14. What are two potential problems with using tape media to back up server data?
(Choose two.)
Tape is not a cost-effective means of backing up data.
Data tapes are difficult to store offsite.
Data tapes are prone to failure and must be replaced often.
Tape drives require regular cleaning to maintain reliability.
Backup logs are not available with tape backup solutions.
15. What is the term for the public network between the boundary router and the firewall?
“clean” LAN
intranet
DMZ
extranet
16. Which two characteristics of network traffic are being monitored if a network
technician configures the company firewall to operate as a packet filter? (Choose two.) applications
physical addresses
packet size
ports
protocols
17. When is the use of out-of-band network management necessary? when a server needs to be monitored across the network
when the management interface of a device is not reachable across the network
when enhanced monitoring features are required to gain an overall view of the entire network
when it is desirable to use the information that is provided by SNMP
18. What network layer security protocol can secure any application layer protocol used
for communication? HTTPS
IMAP
FTPS
IPSEC
TLS
19. Before a technician upgrades a server, it is necessary to back up all data. Which type of
backup is necessary to ensure that all data is backed up? daily
differential
full
incremental
partial
20. What AAA component assigns varying levels of rights to users of network resources? auditing
accounting
authorization
access control
authentication
acknowledgement
21. Refer to the exhibit. While the user on router A is connected to router B through telnet,
the CTRL-SHIFT-6 x keystroke is entered. What effect does this have? It logs the user out of router A.
It suspends the connection to router B.
It closes the connection to router B.
It logs the user out of both router A and router B.
22. While downloading an IOS image from a TFTP server, an administrator sees long
strings of exclamation marks (!) output to the console. What does this mean?
The transfer is working.
The TFTP server is not responding.
The IOS file is corrupt and is failing the checksum verification.
There is not enough space in flash to hold the image.
23. What is the term used to describe the area of a network which stores servers that
areaccessible to any users from the Internet?
“clean” LAN
intranet
DMZ
extranet
24. What does the command copy flash tftp accomplish? It copies the IOS in flash to a TFTP server.
It copies the startup-configuration file in flash to a TFTP server.
It copies the running-configuration file in flash to a TFTP server.
It copies the configuration register settings in flash to a TFTP server.
Chapter 9
1. How many usable host addresses does the 192.168.1.0/25 subnet provide?
254
128
127
126
64
62
2. A network technician has isolated a problem at the transport layer of the OSI model.
Which question would provide further information about the problem?
Do you have a firewall that is configured on your PC?
Do you have a link light on your network card?
Is your PC configured to obtain addressing information using DHCP?
What default gateway address is configured in your TCP/IP settings?
Can you ping http://www.cisco.com?
3. Refer to the exhibit. A network administrator is in the process of sending a
preconfigured text file to a router. When the administrator pastes the configuration into
the router, an error message appears. What is the problem with the IP addressing scheme? Serial0/0 is configured with a network address.
The IP address on FastEthernet0/0 overlaps with the IP on FastEthernet0/1.
Serial0/1 is configured with a broadcast address.
The IP address on FastEthernet0/0 overlaps with the IP on Serial0/1.
4. A user can access any web page on the Internet but cannot access e-mail. What
troubleshooting method would be most efficient for troubleshooting this issue? top-down
bottom-up
divide-and-conquer
impossible to determine from this information
5. Refer to the exhibit. What are two possible causes for the interface status? (Choose two.)
The loopback address is not set.
The encapsulation type is mismatched.
A cable is not attached to the interface.
Keepalive messages are not being received.
The interface is administratively shut down.
6. Refer to the exhibit. Host H1 on the LAN is not able to access the FTP server across the
Internet. Which two configuration statements are causing this problem? (Choose two.)
There is no route to the Internet.
The IP address on Fa0/0 is incorrect.
The IP address on S0/0/0 is incorrect.
The NAT command on the Fa0/0 interface is applied in the wrong direction.
The NAT command on the S0/0/0 interface is applied in the wrong direction.
7. Which two conditions identify issues that are confined to Layer 1? (Choose two.)
cables that exceed maximum length
encapsulation errors
viruses and worms that create excessive broadcast traffic
poor termination of cables
receiving “line protocol down” messages on the router console
8. A network administrator is upgrading a Cisco 1841 router by adding a WIC-2T module
card. Which show command can the administrator use to verify that the module is
correctly recognized by the router? show flash:
show version
show ip route
show startup-configuration
9. Hosts on two separate subnets cannot communicate. The network administrator suspects
a missing route in one of the routing tables. Which three commands can be used to help
troubleshoot Layer 3 connectivity issues? (Choose three.) ping
show arp
traceroute
show ip route
show controllers
show cdp neighbor
10. Refer to the exhibit. Which statement is true regarding the IP address configuration? Interfaces Fa0/0 and Fa0/1 can be in the same subnet.
Interface Fa0/0 and NetworkA can be in the same subnet.
Interface Fa0/0 and NetworkB can be in the same subnet.
Interface Fa0/1 and NetworkB can be in the same subnet.
11. A network administrator plugs a new PC into a switch port. The LED for that port
changes to solid green. What statement best describes the current status of the port? There is a duplex mismatch error.
There is a link fault error. This port is unable to forward frames.
The port is operational and ready to transmit packets.
This port has been disabled by management and is unable to forward frames.
The flash memory is busy.
12. Refer to the exhibit. Which three statements are true about the output of the show ip
interface brief command? (Choose three.) FastEthernet0/0 is functioning correctly.
The shutdown command has been applied on Serial0/0.
FastEthernet0/0 was configured by the startup-config at bootup.
Serial0/0 is experiencing a Layer 1 network problem.
FastEthernet0/1 is experiencing a Layer 2 network problem.
Because the port is down, Serial0/1 has an IP address that does not show in
the output.
13. Refer to the exhibit. Users on the 10.12.10.0/24 network are unable to access anyone on
the 10.10.10.0/24 network. What two problems exist in the network? (Choose two.)
R2 is using a different version of RIP.
R2 has a missing network statement.
R1 has an incorrect network statement.
R3 has an incorrect network statement.
A routing loop is occurring between all three routers.
14. Refer to the exhibit. The PC is trying to ping router B at 192.168.2.2, but it fails. What
is the problem? The PC is on the wrong subnet.
The default gateway on the PC should be 192.168.1.1.
The default gateway should be 192.168.2.2.
The DNS server is incorrect.
The IP address for Fa0/0 on router A is incorrect.
15. An administrator is creating a lab to simulate a WAN connection. During the setup,the
administrator notices that there are different encapsulation types on each end of the serial
connection. At what layer of the OSI model is this problem occurring? Layer 2
Layer 4
Layer 5
Layer 6
16. Refer to the exhibit. A router initially boots up to ROMMON mode. The administrator
enters the dir flash: command and sees the output that is shown. What should the
administrator do next?
Load a new IOS onto the router by the use of TFTP.
Load a new IOS onto the router via XMODEM.
Boot the router using the reset command in ROMMON.
Erase the file in flash and reboot the router.
17. A PC is able to reach devices that are located both inside and outside the network.
However, when trying to reach an FTP server that is located on the same subnet, the PC
fails to make a connection. The administrator has several other PCs
that are located in the same subnet try a connection to the FTP server and they are
successful. Which troubleshooting tool can be used to determine the problem between the
PC and the FTP server?
cable tester
digital multimeter
protocol analyzer
network analyzer
18. Refer to the exhibit. Which IP address is misconfigured and is causing connectivity
problems between hosts and servers?
HostA
HostB
Server1
Server2
R1 Fa0/0
R1 Fa0/1
19. Which problem is associated with Layer 4 of the OSI model? A firewall is blocking Telnet packets to a host.
A host has an incorrect IP address.
A router has no route to a host.
A host sent a malformed HTTP request.
20. A user is having trouble accessing the Internet. A network administrator begins by
verifying that the IP address of the PC is correctly configured. Next the administrator
pings the default gateway. Based on this information, what type of troubleshooting method
is the administrator employing? top-down
bottom-up
divide-and-conquer
impossible to determine from this information
21. An ISP help desk technician receives a call from a customer who reports that no one at
their business can reach any websites or get their e-mail. After testing the communication
line and finding everything fine, the technician instructs the customer to run nslookup
from the command prompt. What does the technician suspect is causing the customer‟s
problem? improper IP address configuration on the host
hardware failure of the ISR used to connect the customer to the ISP
bad cables or connections at the customer site
failure of DNS to resolve names to IP addresses