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

1. A. 1
2. B. 2
3. C. 3
4. D. 4

Correct Answer: D

What is the function of the PHY Preamble?

1. A. To set the modulation method for the MPDU
2. B. Allows the receiver to detect and synchronize with the signal
3. C. To terminate a conversation between transmitter and receiver
4. D. Carries the NDP used in Transmit Beamforming and MU-MIMO

Correct Answer: B

When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

1. A. Frame body excluding the LLC
2. B. Frame body including the LLC
3. C. Frame body and MAC Header
4. D. The whole MPDU

Correct Answer: C

How is the length of an AIFS is calculated?

1. A. AIFSN * Slot Time + SIFS
2. B. SIFS * Slot Time + AIFSN
3. C. DIFS + SIFS + AIFSN
4. D. SIFS + AIFS * Time Unit

Correct Answer: A
(or length) of an AIFS interval. AIFSN values are set for each access category, giving the AIFS
[AC] a shorter or longer duration, in accordance with the desired priority. This is demonstrated by the AIFS[AC]
formula:
AIFS[AC] = AIFSN[AC] × aSlotTime + aSIFSTime

A PHY Header is added to the PSDU at which sub-layer?

1. A. LLC
2. B. MAC
3. C. PLCP
4. D. PMD

Correct Answer: C
The PLCP adds a preamble and PHY header to the PSDU.