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CWNP Certified wireless analusis professional(cwap) Sample Questions:

1. An administrator decides to optimize wireless LAN performance by adjusting the fragmentation threshold on each access point to a value much lower than the default of
2346 bytes. She notices that when wireless client stations are doing prolonged data transfers from a wired server, that downstream performance is better than it was before her adjustments. One problem she has not yet solved is why performance in the upstream direction has not been improved due to these adjustments. As a wireless protocol analyst, which of the following explanations would you give to the administrator?

A) World Mode (also known as Multi-Domain Operation) must be enabled for fragmentation to be bi-directional due to regulatory requirements in most countries.
B) Fragmentation thresholds settings are only effective in the downstream direction (toward the wireless client stations) as specified by the IEEE 802.11 standard.
C) When configuring fragmentation threshold values, it's important to enable RTS/CTS also in order to get effective bi-directional results.
D) Fragmentation thresholds are uniquely set on each wireless client station and access point and affect only transmissions from that node in particular.
E) The administrator must enable client fragmentation support by configuring the access point to broadcast a special message to the clients in each beacon. This message will automatically notify the wireless client stations to use the same fragmentation threshold value used by the access point.
F) Fragmentation is only supported bi-directionally when Antenna Diversity is enabled on both wireless client stations and the access point.

2. An 802.11g compliant wireless client station sends a Data frame to a wired station that is connected to a Fast Ethernet switch. The 802.11g Data frame has a payload (MSDU) of
1600 bytes. Which option below most accurately describes how the access point handles this Data frame?

A) The access point uses 802.1h frame translation to compress the 802.11 frame payload into the 802.3 frame payload.
B) The access point removes the 802.11 header and replaces it with an RFC 1042 compliant 802.3 header. It then forwards the frame to the destination station.
C) The access point drops the frame.
D) The access point fragments the frame into two standard 802.3 frames and forwards both fragments to the destination station.
E) The access point removes the 802.11 header and replaces it with an 802.3 LLC/SNAP header that allows it to forward the frame to the destination station.

3. In the analyzer trace shown, the TBTT is nominally 100 Kilomicroseconds. Why does the difference between the time Beacons are sent vary?

A) Beacon frames vary in size, and therefore some take slightly longer to send than others.
B) This trace is taken of an 802.11b/g mixed mode network where both 802.11b and
802.11g nodes are active on the network. The access point is changing slot times from short to long as needed.
C) The access point must compete to gain access to the RF medium in order to transmit a beacon.
D) The DCF Interframe space is nominally 50 , but typically varies by as much as 10 (?0%) causing delays in beacons.

4. ABC Company's wireless LAN administrator is getting complaints from one user that his wireless LAN 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 of the following statements can you conclude to be true that are related to the complaining user's throughput problem?

A) The complaining user's wireless client station should be using RTS/CTS as a protection mechanism, but it is not.
B) The complaining user's station is retransmitting fragments many times likely due to nearby RF interference
C) The complaining user's wireless LAN client utilities are configured for a small fragmentation threshold.
D) The access point is not signaling for protection (Protection = no) in the Beacons, but it should be.
E) The access point is 802.11g, and the complaining user's wireless client station is
802.11b

5. Which of the following steps must be taken prior to use of a wireless LAN protocol analyzer?

A) Configure the wireless LAN card client utilities for RF Monitor mode.
B) Load special firmware into the wireless LAN card being used for analysis.
C) Disable all installed network adapters except for the wireless LAN card in use.
D) Install a special driver for the specific wireless LAN card being used.
E) Load the wireless LAN protocol interpreter engine provided by the manufacturer.

Solutions: