CWAP PW0-270 問題集

質問 1：
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 has made no impact on WLAN operation in the band.
B. The video transmitter is preventing all WLAN transmissions in the band.
C. The video transmitter is preventing WLAN operation on channel 6, and has only a minor impact on channels 1 and 11.
D. The video transmitter is preventing all WLAN transmissions on channel 6, and its impact on channels 1 and 11 is severe.
正解：C

質問 2：
What two IEEE 802.11 entities may be used to separate successful transmissions within an EDCA TXOP? (Choose 2)
A. AIFS
B. SIFS
C. PIFS
D. ACK
E. CAP
F. EIFS
G. RIFS
正解：B,G

質問 3：
Given the screenshot shown,

Choose the statement that accurately describes what is being seen by this protocol analyzer.
A. Three access points are on the same channel in the same physical area.
B. Three wireless stations are participating in an Ad Hoc WLAN.
C. One access point is using the 802.11 round robin Beacon feature.
D. A Single Channel Architecture (SCA) WLAN solution has three WLAN profiles configured
正解：B

質問 4：
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 complaining user's station is retransmitting fragments many times likely due to nearby RF interference.
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 access point and other stations are using ERP-OFDM modulation, and the complaining user's wireless client station is using HR/DSSS modulation.
正解：C,E

質問 5：
As it relates to a spectrum analyzer, complete the following sentence.
The ____________ plot always displays the percentage of time (shown on the Y axis) that the overall RF power is a certain specified threshold (of amplitude) above the noise floor for a given frequency range (shown on the X axis).
A. Real-Time FFT
B. SNR
C. Interferer Count
D. FFT Duty Cycle
E. Swept Spectrogram
正解：D

質問 6：
In which 802.11 frames is the SSID present, provided the SSID is not removed through proprietary software configuration by an administrator? (Choose 3)
A. Probe Response
B. Association Response
C. Authentication
D. Reassociation Request
E. Disassociation
F. Association Request
正解：A,D,F