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CWNP PW0-205 Exam Syllabus Topics:

CWNP Certified wireless analusis professional(cwap) Sample Questions:

1. Which of the following is true regarding frame acknowledgement in an 802.11 wireless LAN?

A) Multicast frames are acknowledged by client stations participating in the multicast data stream only.
B) Broadcast frames are acknowledged by all client stations participating in PCF mode.
C) Directed management frames such as authentication and association requests are always acknowledged.
D) Data frames are not acknowledged if the Layer 4 protocol is TCP because TCP has its own ACK frames. UDP datagrams are always acknowledged.
E) Data frame retransmissions are not acknowledged if they are fragmented.
F) PS-Poll frames may be acknowledged either with an ACK frame or with a Data frame

2. An 802.11b PPDU's preamble consists of two fields and can collectively be considered
"long" or "short" by the 802.11b standard. Which of the following is true regarding the PLCP preamble?

A) Long and short preamble lengths are both variable depending on the modulation in use on the network, and access points always inform stations of the preamble length in use on the network.
B) An 802.11b access point that supports both long and short preambles may allow stations that are using different preamble lengths to communicate through it simultaneously.
C) A short preamble uses a Sync field of 40 bits, and stations and access points must have matching preamble lengths in order to communicate.
D) When short preambles are being used, the Sync and SFD fields both consist of 16 bits.
Only access points have configurable preamble lengths.
E) A long preamble uses a Sync field of 128 bits, and both stations and access points may have configurable preamble lengths.
F) 802.11g stations associating to 802.11b access points must use the DSSS preamble length specified by the access point.

3. An Announcement Traffic Indication Message (ATIM) frame is used by stations operating in an IBSS to notify other stations of their intention to transmit data. Which fixed fields and information elements does the ATIM frame include?

A) IBSS Parameter Set and Status Code
B) Capability Information and Timestamp
C) Challenge Text and Authentication Algorithm
D) SSID and Supported Rates
E) The ATIM contains no fixed fields or information elements

4. Given one screenshot of a fragment burst and another screenshot of one of the data frames decoded, determine which statements are true.

A) The RTS/CTS threshold value on the transmitter is set to 500 bytes.
B) This fragment is a retransmission.E.This fragment is a retransmission.E.This fragment is a retransmission.
C) The transmitter of this frame is allowed to change its power management mode to Active.D.The transmitter of this frame is allowed to change its power management mode to Active.
D) The frame decode shown is of the second fragment in the sequence.
E) The sequence number of 169 shown in the decode is unique to the communication between the transmitting station and the access point.
F) The duration value of 508 usec is exactly enough to reserve the medium on behalf of the SIFS and ACK to follow this fragment

5. 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) 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.
D) 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.

Solutions: