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質問 1：
A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources.
From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?
A. The tablets are entering power save mode and failing to wake up to receive the access points transmissions
B. The tablets are connecting to the wrong SSID
C. A high noise floor has resulted in a SNR of less than 20%
D. There is a power mismatch between the APs and the clients
正解：A
質問 2：
Using a portable analyzer you perform a packet capture next to a client STA and you can see that the STA is associated to a BSS. You observe the STA sending packets to the AP and the AP sending packets to the STA.
Less the 2% of all packets are retransmissions. You move to capture packets by the AP and, while the retry rate is still very low, you now only see unidirectional traffic from the AP to the client. How do you explain this behavior?
A. There is a transmit power mismatch between the client and the AP and while the client can hear the Aps traffic, the AP cannot hear the client.
B. The portable analyzer has a lower receive sensitivity than the AP and while it can't capture the packets from the client STA, the AP can receive them OK.
C. The STA is transmitting data using more spatial streams than the potable analyzer can support
D. The portable analyzer is too close to the AP causing CCI, blinding the AP to the client's packets
正解：B
質問 3：
Which common feature of a Spectrum Analyzer would be the best to help you locate a non-802.11 interference source?
A. Location filter
B. Waterfall plot
C. Device finder
D. Max hold
正解：C
質問 4：
What does the value of the Listen Interval field in an Association request frame indicate?
A. How long a STA waits for an Ack before retransmitting the frame
B. How often a STA will go off channel to look for other BSSs
C. How long a STA performing active scanning will listen for Probe Responses before changing channels
D. How often a STA in power save mode wakes up to listen to Beacon frames
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
What is the function of 802.11 Management frames?
A. Communicate configuration changes between WLAN controller and APs
B. Manage the BSS
C. Manage the flow of data
D. Prioritize network administration traffic
正解：A
A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources.
From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?
A. The tablets are entering power save mode and failing to wake up to receive the access points transmissions
B. The tablets are connecting to the wrong SSID
C. A high noise floor has resulted in a SNR of less than 20%
D. There is a power mismatch between the APs and the clients
正解：A
質問 2：
Using a portable analyzer you perform a packet capture next to a client STA and you can see that the STA is associated to a BSS. You observe the STA sending packets to the AP and the AP sending packets to the STA.
Less the 2% of all packets are retransmissions. You move to capture packets by the AP and, while the retry rate is still very low, you now only see unidirectional traffic from the AP to the client. How do you explain this behavior?
A. There is a transmit power mismatch between the client and the AP and while the client can hear the Aps traffic, the AP cannot hear the client.
B. The portable analyzer has a lower receive sensitivity than the AP and while it can't capture the packets from the client STA, the AP can receive them OK.
C. The STA is transmitting data using more spatial streams than the potable analyzer can support
D. The portable analyzer is too close to the AP causing CCI, blinding the AP to the client's packets
正解：B
質問 3：
Which common feature of a Spectrum Analyzer would be the best to help you locate a non-802.11 interference source?
A. Location filter
B. Waterfall plot
C. Device finder
D. Max hold
正解：C
質問 4：
What does the value of the Listen Interval field in an Association request frame indicate?
A. How long a STA waits for an Ack before retransmitting the frame
B. How often a STA will go off channel to look for other BSSs
C. How long a STA performing active scanning will listen for Probe Responses before changing channels
D. How often a STA in power save mode wakes up to listen to Beacon frames
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
What is the function of 802.11 Management frames?
A. Communicate configuration changes between WLAN controller and APs
B. Manage the BSS
C. Manage the flow of data
D. Prioritize network administration traffic
正解：A
相沢** -
無駄なく効率よくCWAP-403を学べるとおもう。実力を測ってから学習を始められるので、苦手な分野の知識を補完したり、得意な分野をより伸ばす、といったことがより効率的にできます。