CWNP Certified wireless analusis professional(cwap) 認定 PW0-205 試験問題:

1. Given the 802.11 Beacon Management frame decode shown, determine which statement is true.

A) The access point has both 1 Mbps and 2 Mbps configured as basic rates.
B) This Beacon Management frame came from an 802.11g access point.
C) The duration value of 0 usec means that this access point is operating in PCF mode.
D) The access point is operating on channel 3.
E) ERP-OFDM mobile stations must use the RTS/CTS protocol before Data transmissions

2. When capturing traffic using a wireless LAN protocol analyzer that has a single 2.4 GHz radio card, which of the following is true?

A) All traffic on one 2.4 GHz channel and its directly adjacent channels can be captured simultaneously.
B) All traffic on only one 2.4 GHz channel can be captured at any given time.
C) The number of channels that an analyzer can capture simultaneously is dependent on the vendor implementation.
D) All traffic on all 2.4 GHz channels can be captured simultaneously.

3. When RTS/CTS is used in DCF mode, what is the frame exchange sequence between two wireless stations including interframe spaces?

A) EIFS-RTS-CTS-SIFS-DATA-SIFS-ACK
B) DIFS-RTS-CTS-SIFS-ACK-DATA-SIFS-ACK
C) DIFS-RTS-ACK-CTS-ACK-DATA-SIFS-ACK
D) DIFS-RTS-SIFS-CTS-SIFS-DATA-SIFS-ACK
E) PIFS-RTS-SIFS-CTS-SIFS-DATA-SIFS-ACK

4. Which of the following descriptions accurately describes IEEE 802.11 compliant Power Save mode operation in a DCF Basic Service Set?

A) When the access point's buffer is full, the access point wakes all client stations using a PS-Poll frame so that they can receive the data.
B) After waking at a schedule TBTT, client stations automatically send Null Function frames to the access point with the Power Management bit cleared.
C) After waking from a low power state, client stations listen for the next beacon to determine if sending a PS-Poll frame to the access point is necessary.
D) Upon receiving traffic for a dozing station, the access point wakes the client station using a PS-Poll frame so that the client station can receive the data.
E) Following a period of time in a low power state, client stations wake themselves and automatically poll the access point for traffic using a PS-Poll frame.

5. ABC Corp has just installed a single 802.11b access point into their medium-sized office environment. As the wireless LAN administrator at ABC Corp, you use a wireless protocol analyzer to troubleshoot the problem. You place your analyzer close to the access point, and capture some traffic from office users. Given the screenshot shown, which of the following statements offer the best explanation for the poor wireless LAN performance of ABC's new 802.11b wireless LAN?

A) There is likely a source of RF interference somewhere around the access point. This is causing many data frames to be retransmitted, so overall wireless LAN throughput has been greatly diminished.
B) One of the wireless LAN users has moved far enough away from the access point that his client station has begun transmitting frames at the minimum supported data rate. Even when a single user uses this rate for Data frames, throughput for the entire wireless LAN as a whole is slowed significantly.
C) Due to an 802.11g client joining the BSS, protection mechanisms have been enabled in the BSS by the access point. These protection mechanisms greatly increase protocol overhead, thereby decreasing overall wireless LAN throughput.
D) A nearby 802.11b access point is operating on an adjacent channel causing a significant amount of corrupt frames within ABC's BSS. These corrupt frame fragments are congesting the channel on which ABC's wireless LAN is operating, thereby decreasing its throughput.

質問と回答：