1161 お客様のコメント
質問 1：
Which statements are true regarding wireless network discovery and scanning processes for an HT network? (Choose 2)
A. Access points send Beacon frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner including the channel for which the access point is configured.
B. Client stations may continually send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner, regardless of their association state.
C. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they receive at least 3 Probe Response frames.
D. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they associate with an access point. After associating to an access point, they no longer transmit Probe Request frames.
E. Access points send Beacon frames only on the HT channel in the 2.4 GHz ISM band for which the access point is configured, and only after scanning that channel to discover existing BSSs.
正解：B,E
質問 2：
What HT PPDU format is shown in the exhibit?
A. Non-HT format
B. HT-mixed format
C. HT-greenfield format
D. Dual Training Field format
E. ERP-OFDM format
F. Non-HT duplicate format
正解：B
質問 3：
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 access point is not signaling for protection (Protection = no) in the Beacons, but it should be.
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 complaining user's wireless client station should be using RTS/CTS as a protection mechanism, but it is not.
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 4：
ABC International has installed a new smart ZigBee controlled lighting system. However, the network team is concerned that this new system will interface with the existing WLAN and has asked you to investigate the impact of the two systems operating simultaneously in the 2.4 GHz band. When performing Spectrum Analysis, which question could you answer by looking at the FFT plot?
A. Is the WLAN corrupting ZigBee system messages?
B. Do the ZigBee channels used by the lightning system overlap with the WLAN channels?
C. Is the ZigBee system causing an increase in WLAN retries?
D. Is the ZigBee system using more the 50% of the available airtime?
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
iPerf is a tool used in what category of testing?
A. Throughput
B. Name resolution
C. Connection
D. Configuration
正解：A
質問 6：
You suspect an interfere may exist in a BSS that is experiencing sporadic problems. You want to identify and locate the device. The actual device identify is not known.
What tool should be used for this purpose?
A. Spectrum analyzer
B. Cable tester
C. Protocol analyzer
D. Throughput tester
正解：A
質問 7：
What is encrypted within the fourth frame of the 4-Way Handshake?
A. GMK
B. GTK
C. PTK
D. PMK
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 8：
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 9：
The network administrator at ABC Engineering has taken a large packet capture from one of their APs running in monitor mode. She has very little knowledge of 802.11 protocols but would like to use the capture file to evaluate the overall health and performance of their wireless network.
When she asks your advice, which tool do you recommend she opens the packet capture file with?
A. Spectrum analyzer
B. Capture visualization tool
C. WLAN scanner
D. Python
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
Which statements are true regarding wireless network discovery and scanning processes for an HT network? (Choose 2)
A. Access points send Beacon frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner including the channel for which the access point is configured.
B. Client stations may continually send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner, regardless of their association state.
C. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they receive at least 3 Probe Response frames.
D. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they associate with an access point. After associating to an access point, they no longer transmit Probe Request frames.
E. Access points send Beacon frames only on the HT channel in the 2.4 GHz ISM band for which the access point is configured, and only after scanning that channel to discover existing BSSs.
正解：B,E
質問 2：
What HT PPDU format is shown in the exhibit?
A. Non-HT format
B. HT-mixed format
C. HT-greenfield format
D. Dual Training Field format
E. ERP-OFDM format
F. Non-HT duplicate format
正解：B
質問 3：
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 access point is not signaling for protection (Protection = no) in the Beacons, but it should be.
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 complaining user's wireless client station should be using RTS/CTS as a protection mechanism, but it is not.
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 4：
ABC International has installed a new smart ZigBee controlled lighting system. However, the network team is concerned that this new system will interface with the existing WLAN and has asked you to investigate the impact of the two systems operating simultaneously in the 2.4 GHz band. When performing Spectrum Analysis, which question could you answer by looking at the FFT plot?
A. Is the WLAN corrupting ZigBee system messages?
B. Do the ZigBee channels used by the lightning system overlap with the WLAN channels?
C. Is the ZigBee system causing an increase in WLAN retries?
D. Is the ZigBee system using more the 50% of the available airtime?
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
iPerf is a tool used in what category of testing?
A. Throughput
B. Name resolution
C. Connection
D. Configuration
正解：A
質問 6：
You suspect an interfere may exist in a BSS that is experiencing sporadic problems. You want to identify and locate the device. The actual device identify is not known.
What tool should be used for this purpose?
A. Spectrum analyzer
B. Cable tester
C. Protocol analyzer
D. Throughput tester
正解：A
質問 7：
What is encrypted within the fourth frame of the 4-Way Handshake?
A. GMK
B. GTK
C. PTK
D. PMK
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 8：
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 9：
The network administrator at ABC Engineering has taken a large packet capture from one of their APs running in monitor mode. She has very little knowledge of 802.11 protocols but would like to use the capture file to evaluate the overall health and performance of their wireless network.
When she asks your advice, which tool do you recommend she opens the packet capture file with?
A. Spectrum analyzer
B. Capture visualization tool
C. WLAN scanner
D. Python
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
Morita -
本問題集学習し、CWAP-404合格しました。Pass4Testの説明は遥かにわかりやすいのでよいです。