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CWNP Certified Wireless Analysis Professional Sample Questions:

1. What is the purpose of a PHY preamble?

A) It indicates to the PHY the modulation that shall be used for transmission (and reception) of the PSDU.
B) It communicates important information about the PSDU's length, rate, and upper layer protocol- related parameters.
C) It provides the receiver(s) with an opportunity for RF channel synchronization prior to the start of the PLCP header.
D) It provides a cyclic redundancy check (CRC) for the receiving station to validate that the PLCP header was received correctly.

2. Which statement is true regarding VHT Transmit Beamforming?

A) The beamformee calculates the feedback matrix and the beamformer calculates the steering matrix
B) The beamformer calculates both the feedback and steering matrix
C) The beamformee calculates the steering matrix and the beamformer calculates the feedback matrix
D) The beamformee calculates both the feedback and steering matrix

3. 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 Information Element
B) HT Operation Element
C) Non-HT Present Element
D) HT Protection Element

4. Given: A MU-MIMO sounding exchange includes the AP transmitting an NDP Announcement frame followed by the NDP and the MU-STAs response with a Compressed Beamforming Frame containing the Feedback matrix.
How often does this MU-MIMO sounding exchange happen?

A) Never; this exchange is only used by UL OFDMA
B) Once for each MU-MIMO group
C) At regular intervals
D) Before every SU-MIMO frame transmission

5. Which bit in a neighboring BSS's Beacon frame will trigger an AP to enable protection mechanism?

A) Enable Protection
B) Barker Preamble Mode
C) Use Protection
D) Non-ERP Present

Solutions: