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CWNP Certified wireless analusis professional(cwap) Sample Questions:

1. While at a government-operated facility, you are attempting to troubleshoot a wireless LAN performance problem using a wireless protocol analyzer. When you start capturing frames, you see a proprietary layer 2 protocol running over the 802.11g network as shown in this screenshot. The facility's wireless LAN administrator confirms that this protocol is proprietary and used for both data encryption and compression. How will this affect the steps you take to troubleshoot performance problems on this wireless LAN?

A) In order to troubleshoot performance problems on a network using a proprietary encryption protocol, you must use a wireless protocol analyzer that has integrated support for the protocol in use.
B) Troubleshooting will be hindered, but not eliminated because only part of the information needed for performance measurements by the analyzer is encrypted. Each Data frame's MAC header will be encrypted, but the PLCP header can still be decoded successfully.
C) As long as you load the proprietary client software onto your analyzer computer, you will be able to see all of the Data frames fully decoded. Doing this will allow you to troubleshoot the wireless LAN as though no encryption were in use.
D) The proprietary encryption protocol will have no effect on your troubleshooting steps because the wireless LAN analyzer can still decode the PLCP and MAC headers of Data frames. This situation is essentially no different than troubleshooting a wireless LAN that uses WEP.

2. Which of the following must occur before a client station operating in a DCF 802.11 network can transmit a frame over the wireless medium?

A) PIFS expiration must occur.
B) The access point must send a CF-End frame.
C) The NAV must be equal to zero.
D) The Backoff timer must expire.
E) The station must receive a CF-Poll frame from the access point.
F) The client station's carrier-sense mechanism must have determined that the medium is idle.
G) DIFS expiration must occur.

3. As a wireless LAN consultant, you have been contacted by one of your customers to go to their premises 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 utilities. Using a wireless protocol analyzer, where and how would you begin troubleshooting this problem?

A) Position the analyzer near the access point. See if Station-Z frames are reaching the access point and if so, analyze their signal strength.
B) Position the analyzer half way between Station-Z and the access point. Analyze the data rate at which frames are sent and how long they take to be received.
C) Position the analyzer near Station-Z. Analyze Station-Z transmissions and acknowledgements. Look for RF and obstacle-induced interference.
D) Position the analyzer half way between Station-Z and the access point. Analyze the distance between Station-Z and the access point.
E) Position the analyzer near Station-Z. Analyze the frames Station-Z is receiving, looking for corrupted frames.

4. When an access point sends an RTS frame, the duration field will contain an amount of time, measured in microseconds, equal to which of the following?

A) 2 ACK, 1 RTS, 1 DATA, 4 SIFS
B) 1 RTS, 1 CTS, 1 DATA, 2 ACK, 4 SIFS
C) 1 ACK, 1 CTS, 1 DATA, 3 SIFS
D) 1 DATA, 1 RTS, 2 SIFS, 1 DIFS, 1 ACK

5. What 802.11 MAC layer function is illustrated by the following diagram?

A) Sequential Fragmentation
B) Fragment Bursting
C) PCF mode polling
D) CP Regulated Spacing
E) Sequential Acknowledgements

Solutions: