Certified Wireless Analysis Professional (PW0-270) Free Practice Test

Question 1

What MAC layer information will a dual-band 802.11n protocol analyzer capture if it is capturing data frames encrypted with WPA2-Enterprise? (Choose 2)

A. Null Data frames

B. Short Interframe Spaces

C. TCP SYN datagram

D. Sequence Control fields

E. Legacy Signal field

F. Source IP Address

Correct Answer: A,D

Question 2

As a WLAN consultant, you have been asked to troubleshoot a problem with a single wireless client station (Station-Z). Your customer informs you that other wireless client stations are not having problems with wireless connectivity, and that Station-Z is configured in the same manner as all other wireless client stations on the network. Station-Z is showing an unusually high retransmission count in its client utility statistics. Using a wireless protocol analyzer, where and how should you begin troubleshooting this problem? (Choose 2)

A. Position the analyzer near the access point. See if Station-Z's frames are reaching the access point and if so, analyze their signal strength.

B. Position the analyzer halfway between Station-Z and the access point. Measure the distance between Station-Z and the access point.

C. Position the analyzer near Station-Z. Analyze Station-Z's transmissions and acknowledgements. Look for RF and obstacle-induced interference.

D. Position the analyzer halfway between Station-Z and the access point. Analyze the data rate at which frames are sent and how long they take to be received.

E. Position the analyzer near Station-Z. Analyze the frames Station-Z is receiving, looking for delayed ACK frames.

Correct Answer: A,C

Question 3

Given the IEEE 802.11 Beacon frame decode shown,

determine which statement is definitively true.

A. The access point has both 1 Mbps and 2 Mbps configured as basic rates.

B. ERP mobile stations must use the RTS/CTS protocol before Data transmissions.

C. This Beacon frame came from an ERP or HT access point.

D. The SSID value in this Beacon is null.

E. The access point is operating on channel 3.

Correct Answer: C

Question 4

Which statements are true regarding wireless network discovery and scanning processes for an HT network? (Choose 2)

A. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they receive at least 3 Probe Response frames.

B. Access points send Beacon frames only on the HT channel in the 2.4 GHz ISM band for which the access point is configured, and only after scanning that channel to discover existing BSSs.

C. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they associate with an access point. After associating to an access point, they no longer transmit Probe Request frames.

D. Client stations may continually send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner, regardless of their association state.

E. Access points send Beacon frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner including the channel for which the access point is configured.

Correct Answer: B,D

Question 5

As shown in the exhibit, a spectrum analyzer has measured both 802.11 and non-802.11 RF transmissions in the 2.4 GHz band. The exhibit shows a continuous video transmitter near channel
5.Based upon the exhibit,

what impact does the video transmitter have on WLAN operations throughout the band?

A. The video transmitter is preventing all WLAN transmissions in the band.

B. The video transmitter is preventing all WLAN transmissions on channel 6, and its impact on channels 1 and 11 is severe.

C. The video transmitter has made no impact on WLAN operation in the band.

D. The video transmitter is preventing WLAN operation on channel 6, and has only a minor impact on channels 1 and 11.

Correct Answer: D

Question 6

ABC Company's WLAN administrator is getting complaints from one user that his WLAN throughput is sluggish compared to other users in his area. The administrator takes his diagnostics laptop, which has a wireless protocol analyzer installed, to the area where the complaining user works. The administrator uses the PING utility to test connectivity from the complaining user's wireless client station to another wireless client station across the closest access point, while capturing the wireless frames. The administrator sees what is displayed in this screenshot.

From this screenshot, which statements can you conclude to be TRUE that are related to the complaining user's throughput problem? (Choose 2)

A. The complaining user's wireless client station should be using RTS/CTS as a protection mechanism, but it is not.

B. The access point and other stations are using ERP-OFDM modulation, and the complaining user's wireless client station is using HR/DSSS modulation.

C. The complaining user's WLAN client utilities are configured with a small fragmentation threshold.

D. The access point is not signaling for protection (Protection = no) in the Beacons, but it should be.

E. The complaining user's station is retransmitting fragments many times likely due to nearby RF interference.

Correct Answer: B,C

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CWAP Certified Wireless Analysis Professional (PW0-270) Free Practice Test