CWAP-403 Online Practice Questions and Answers

You have installed a new 802.11ac WLAN configured with 80 MHz channels. Users in one area are complaining about poor performance. This area is currently served by a single AP. You take a spectrum analysis capture in the poor performing area. While examining the waterfall plot you notice the airtime utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel. What do you conclude?

A. The AP is misconfigured and needs to be reconfigured to 80MHz operation

B. RRM is enabled and has dynamically picked a 20 MHz channel

C. The first 20 MHz is the AP's primary channel and higher airtime utilization on the primary channel is normal when an AP Is configured for 80 MHz operation

D. Non Wi-Fi interference is preventing the APs 80 MHz operation

How many frames make up the Group Key Handshake excluding any Ack frames that may be required?

A. 1

B. 2

C. 3

D. 4

What is the function of the PMD sub-layer?

A. Converts 1s and 0s given to it by the PLCP sub-layer into the appropriate RF signals

B. Provides framing

C. Adds a PHY preamble and header to a PSDU

D. Performs A-MPDU

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 an 802.11 Management frame?

A. Action

B. Authentication

C. PS-Poll

D. Beacon

Which one of the following portions of information is communicated in the PHY Header?

A. Signal strength

B. Date rate

C. SNR

D. Noise

Which one of the statements regarding the Frame Control field in an 802.11 MAC header is true?

A. Only Control frames have a Frame Control field

B. The Frame Control field contains three sub-fields and eight one-bit flags

C. The Frame Control field is used to communicate the duration value

D. The Frame Control field is always set to 0

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

When configuring a long term, forensic packet capture and saving all packets to disk which of the following is not a consideration?

A. Total capture storage space

B. Individual trace file size

C. Real-time packet decodes

D. Analyzer location

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

A. RTS

B. CTS

C. Ack

D. Block Ack