A&Q_ Final Exam - Fundamentals of Wireless LANs (Version 1.2)

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Q: Final Exam - Fundamentals of Wireless LANs (Version 1.2)

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A&Q

Sunday, August 24, 2008

Final Exam - Fundamentals of Wireless LANs(Version 1.2)

1 Bit Flipping, Replay Attacks, and Weak IV collection are all considere

WEP

LEAP

PEAP

IPSec

2 How wide of a band of frequencies is used by 802.11b DSSS?

5 Mhz

11 Mhz

22 Mhz

24Mhz

3 The network administrator wants to ensure that his Aironet bridges ar

36 dBm established by the United States FCC. Currently the bridges

antenna results in a 12 dBi gain. The cabling results in a loss of 6.8 d

installed. What is the EIRP in dB?

34.2

35.3

36.1

36.4

4 What is the difference between higher gain antennas and lower gain a

Higher gain antennas direct energy more precisely.

Higher gain antennas have narrower beamwidths.

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Higher gain antennas have a greater chance of receiving interference

Higher gain antennas have lower bandwidths.

5 When using the site survey tool, a specific mode causes the client ad

to and from its associated AP and provides information on the succes

repeater mode

stand-alone mode

passive mode

active mode

parallel mode

6 When configuring the AP Radio Port Hardware setup page, which set

communication is poor and many client devices are associating with t

low fragment threshold and high RTS threshold

high fragment threshold and high RTS threshold

high fragment threshold and low RTS threshold

low fragment threshold and low RTS threshold

7 Which of the following statements are correct? (Select two.)

Longer cables lose more power than shorter ones .

Thick cables lose more power than thin ones.

Higher frequencies lose more power than lower ones.

Rigid cables lose more power than flexible ones.

8 What does a wireless bridge associate with if it is configured as Root=

clients and repeaters only

other Root=ON devices

Master bridge





ccnp final exam qns 301 to

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no device since it is in maintenance mode

9 What frequency or frequencies does the IEEE 802.11 standard utilize

900 MHz

3.4 GHz

5.4 GHz

2.4 GHz and 5 GHz

900 MHz, 2.4 GHz and 5.4 GHz

10 What is a good antenna to use with an AP to provide coverage for a

5.2 dBi Ground P lane

8.5 dBi Patch Wall

2.15 dBi Rubber Dipole

2.2 dBi Ceiling Mount

11 In the United States, how many nonoverlapping channels are there f

three

four

seven

eight

12 Which of the following antenna types are used for wireless bridges?

rubber dipole

patch wall

Yagi

Ground Plane

solid dish

13 Cisco Aironet bridges operate at which layer of the OSI model?


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physical

data-link

network

transport

14 In DSSS technology, each data bit becomes a chipping sequence. H

standard?

11

12

13

15

15 What are the effects of multipath interference? (Select two.)

distorted signals at the receiving end

increased coverage range

poor signal quality levels

enhanced data throughput

incorrect polarization

16 Which two spread spectrum modulation techniques are used by WL

FDSS

ODSS

DSSS

DFSS

FHSS

17 What is the best way to test the line-of-sight path when doing a site-t

visually


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with a spectrum analyzer

both visually and with a spectrum analyzer

visually and with a Global Positioning System

18 When using high gain omnidirectional antennas, what is helpful in re

diversity

polarization

amplifiers

downtilt

19 Which type of antenna connectors are used by the Cisco Aironet Brid

polarized BNC

reverse TNC

polarized TNC

reverse BNC

20 Which of the following antenna types could be used for a point-to-mu

patch wall

mast mount

Yagi

solid dish

21 Which type of threats originate from hackers who are more highly m

external

internal

structured

unstructured


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22 How does an AP behave when the receive antenna is set to diversity

It will use the antenna that receives the best signal.

It will use both antennas at the same time.

It will round-robin between the two antennas.

The AP will always use one antenna to transmit and the other to r

23 Which statements describe the RF spectrum? (Select two.)

It encompasses both radio waves and microwaves.

Most of the frequencies in the spectrum are unlicensed.

It extends from about 9 MHz to thousands of GHz.

It is used heavily for communications.

The acronym stands for radiated frequency (RF).

24 In a WLAN, what is the purpose of the common DS?

to allow communication between multiple BSSs thereby allo

connectivity

to reduce the number of APs needed to provide reliable connecti

to eliminate the need for connectivity to a wired network

to eliminate the need for station addressing when in roaming mod

25 What is the behavior of a wireless bridge when configured as a root b

It associates and communicates with any wireless device on the n

It associates and communicates only with other root bridges.

It associates and communicates with multiple non-root bridges b

It associates and communicates with multiple non-root b ridg

bridges .

26

In the graphic, which type of cable should be used at the arrow to pr


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coax

fiber-optic

Category 5

UTP

27 Which types of software should be installed on laptops to prevent ha

wireless networks? (Select two.)

spectrum analyzer

antivirus

firewall

protocol analyzer

repair utility

28 Which types of transmission medium are available for use by WLAN

fiber-optic

infrared light

UTP

radio frequencies

STP

29 Which device decodes the various protocol layers in a recorded fram

summaries?

cable tester

network analyzer

spectrum analyzer

time domain reflectometer

30 Which frequency spectrum do FHSS WLANs use in the United State

83 Mhz around the 5 Ghz ISM band


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83 Mhz around the 2.4 Ghz ISM band

900 Mhz around the 5 Ghz ISM band

900 Mhz around the 2.4 Ghz ISM band

31 What are the keys to maintaining a problem-free network environme

fault quickly? (Select three).

communication

data backup

documentation

planning

virus protection

fault tolerance

32 What are the three basic options for configuration on a Cisco Airone

Web-browser interface

SNTP

CLI

CDP

SNMP

SSID

33 Which open standard operating system is licensed for use in many

Symbian

MS DOS

Windows XP

OS/2

34 In WLAN data transmission, what is the significance of having four di

to increase the amount of data that can be transmitted at one ti


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to prevent collisions when accessing the wireless media

to resequence data units at the destination STA

to provide priority levels for access to the wireless media

35 During a routine wireless benchmark inspection, the IT personnel oftransmitting at 60 mW. The AP connects to a 6-dBi gain omni-directi

the final power output radiated by the antenna element?

30 mW

60 mW

120 mW

180 mW

36 At which layer of the OSI model do wireless bridges and APs operate

Layer 4

Layer 3

Layer 2

Layer 1

37 Which type of antenna is referenced as a base in a dBd rating?

plane

yagi

dipole

isotropic

38 Access points often have two antennas attached to them for diversit

diversity? (Select two.)

helps prevent multipath distortion

helps increase signal strength

helps eliminate null coverage areas


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helps prevent diffraction and scattering of the signal

39 When a WLAN is being designed to expand an existing LAN, what s

Select the carrier.

Learn about the current topology and physical structure .

Study the actual network performance.

Provide an estimation of costs for the new equipment needed.

Identify the links that must be replaced.

40 What causes the Status LED to blink green in a 1200 series AP ?

transmitting/receiving packets

no devices associated

general warning

no special meaning

41 Why do APs have two antennas attached to them?

to increase coverage area

to provide diversity

to provide redundancy

to provide symmetry

42 What is the WEP key size specified in the 802.11 standard?

256 bit

64 bit and 128 bit

40 bit and 128 bit

40 bit

43 For a standard survey, how much overlap is sufficient to provide tran


11/14



10%

15%

20%

25%

30%

44 dBm is a reference to which unit of measure?

milliWatt

microWatt

Watt

kiloWatt

45 Which three power modes are available on a Wireless NIC? (Select

CAM

FastCAM

PSP

FastPSP

FastAPA

46 Which topics may be included in the Request for Proposal? (Select t

prices and payment options

workstations and servers specifications

an imp lementation plan

a network topology for the new design

47 At which OSI layer or layers does a wireless AP operate?

Layer 1

Layers 1 and 2


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Layer 2

Layers 2 and 3

48 Which command is used to set the parent AP for a repeater AP?

AP(config)#parent 10.0.0.1

AP(config-if)#parent 1 10.0.0.1

AP(conf ig-if )# parent 1 abcd.1234.ab12

AP(config)#parent abcd.1234.ab12

49 The ACU site survey tool can operate in which modes? (Select two.)

repeater mode

stand-alone mode

passive mode

active mode

parallel mode

50 What are the two methods used by wireless clients to connect to an

two.)

open authentication

shared key authentication

private key authorization

closed authentication

restricted authentication

51 What is the best tool to use if there may be a radio interference probl

cable tester

gauss meter

spectrum analyzer


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time domain reflectometer

52 In addition to physically installing the client adapter card into the wir

card?

a universal client adapter software driver

an interoperability software patch

a client adapter driver with its corresponding AP driver

a client adapter software driver specific to the OS

53 Most data collection devices operate at which speed?

1 Mbps

2 Mbps

5 Mbps

11 Mbps

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A&Q_ Final Exam - Fundamentals of Wireless LANs (Version 1.2)

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