CWAP-403 Online Practice Questions and Answers

Where would you look in a packet trace file to identify the configured Minimum Basic Rate (MBR) of a BSS?

A. Supported Rates and Extended Supported Rates elements in a Beacon frame

B. In the MBR Action frame

C. In the Minimum Basic Rate Element in a Beacon frame

D. In the MBR Information Element in an Association Response frame

How does a VoIP Phone, using WMM Power Save, request data frames buffered at the AP?

A. The VoIP phone transmits a PS-Poll frame

B. The VoIP phone transmits a trigger frame

C. The VoIP phone sets the More Data bit in the MAC Header to 1

D. The VoIP phone The VoIP transmits a WMM Action frame

You're the WLAN administrator for a large retailer based at the HQ in New York. The London-based office has been complaining about WLAN disconnections around lunch time each day. You suspect this might be interference from the staff microwave, how might you test your theory from the New York office?

A. Access the microwave remotely and run a diagnostic check

B. Ask a local member of staff to take some pictures of the microwave, including some close-ups of the door seal so that you can access it

C. Place one of the London APs into spectrum analyzer mode and monitor the situation over lunch time

D. Ask a local member of staff to change the frequency of the microwave and see if the disconnections stop

Which one of the following is not a valid reason for an AP to fail a STAs association?

A. Requesting station has the wrong PSK

B. Does not support the specified authentication algorithm

C. AP is unable to handle additional associations

D. Requesting station does not support all the required data rates

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

What is the formula used to calculate the Duration field value in an RTS frame?

A. RTS Duration field = CTS duration

B. RTS Duration field = Data or management to be sent frame duration

C. RTS Duration field = Data or management frame to be sent duration + CTS duration + one ACK duration + three SIFS

D. RTS Duration field = Data or management frame to be sent duration + CTS duration

You are performing a multiple adapter channel aggregation capture to troubleshoot a VoIP roaming problem and would like to measure the roaming time from the last VoIP packet sent on the old AP's channel to the first VoIP packet sent on the new AP's channel. Which timing column in the packet view would measure this for you?

A. Delta

B. Absolute

C. Roaming

D. Relative

When performing protocol analysis, you notice a high number of RTS/CTS frames being transmitted on an HT network. You suspect this may be due to HT protection mechanisms. Where in the Beacon frame would you look to determine which one of the four HT protection modes the AP is operating in?

A. HT Protection Element

B. HT Information Element

C. HT Operation Element

D. Non-HT Present Element

Which one of the following is not a valid acknowledgment frame?

A. RTS

B. CTS

C. Ack

D. Block Ack

You are troubleshooting a client that is experiencing slow WLAN performance. As part of the troubleshooting activity, you start a packet capture on your laptop close to the client device. While analyzing the packets, you suspect that you have not captured all packets transmitted by the client. By analyzing the trace file, how can you confirm if you have missing packets?

A. Look for gaps in the sequence number in MAC header

B. Protocol Analyzers show the number of missing packets in their statistics view

C. Retransmission are an indication of missing packets

D. The missing packets will be shown as CRC errored packets