CWAP-403 Online Practice Questions and Answers

What Interframe space would be expected between a CTS and a Data frame?

A. SIFS

B. DIFS

C. AIFS

D. PIFS

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

Which one of the following should be the first step when troubleshooting a WLAN issue?

A. Identify capture locations

B. Identify probable causes

C. Perform an initial WLAN scan and see if any obvious issues stand out

D. Define the problem

Which one of the following statements is not true concerning DTIMs?

A. Buffered Broadcast and Multicast traffic will be transmitted following a DTIM

B. The DTIM interval can dictate when an STA will wake up to listen to beacon frames

C. DTIM stands for Delivery Traffic Indication Map

D. Every Beacon frame must contain a DTIM

After examining a Beacon frame decode you see the SSID Element has a length of 0. What do you conclude about this frame?

A. The frame is corrupted

B. This is a common attack on WISP backend SQL databases

C. The beacon is from a BSS configured to hide the SSID

D. SSID elements always have a length of 0

The PLCP sublayer provides framing by adding a header to create what type of data unit?

A. MSDU

B. MPDU

C. PSDU

D. PPDU

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. A high noise floor has resulted in a SNR of less than 20%

C. The tablets are connecting to the wrong SSID

D. There is a power mismatch between the APs and the clients

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

A. RTS

B. CTS

C. Ack

D. Block Ack

Which one of the best following is an advantage of using display filters instead of capture-time filters?

A. Display filters allow for focused analysis on just the packets of interest

B. Once created display filters are reusable for later captures

C. Display filters only hide the packets from view and the filtered packets can be enabled for view later

D. Multiple display filters can be applied simultaneously

During a VHT Transmit Beamforming sounding exchange, the beamformee transmits a Compressed Beamforming frame to the beamformer. What is communicated within this Compressed Beamforming frame?

A. Steering Matrix

B. Beamforming Matrix

C. Feedback Matrix

D. Beamformee Matrix