CWAP-405

CWAP-405 practice questions, page 4 of 5, with answer review and explanations.

Question 16

You have deployed a new 802.11ac WLAN for a customer who wants to take advantage of 802.11ac standardized Transmit Beamforming. After the installation you perform a protocol capture to confirm Transmit Beamforming is operating as expected. When analyzing the protocol exchange you observe the beamformer transmits a VHT NDP Announcement frame but you never see the transmitted NDP. What do you conclude from this behavior?

  1. NDPs are PHY PPDUs which contain no MPDU and therefore will not be displayed in a protocol analyzer.
  2. This is normal, 802.11ac includes the NDP within the VHT NDP Announcement.
  3. This indicates the beamformer is misconfigured.
  4. This behavior is non-standard and is likely a bug with the current driver.

Question 17

After performing a protocol analysis capture on channel 36 you are looking at the radio tap header of a data frame and notice the frame was transmitted at MCS 0 on one spatial stream. At what data rate was the PHY Header for this frame transmitted?

  1. 1 Mbps
  2. 2 Mbps
  3. 6 Mbps
  4. 6.5 Mbps

Question 18

What is used in the PHY header of 802.11ax transmissions to identify stations that are included in an OFDMA RU-based multi-user transmission?

  1. Station ID
  2. Station MAC address
  3. Station IP address
  4. Station TCP port

Question 19

To what does the channel number displayed in the radio tap header refer?

  1. Channel the frame was transmitted on
  2. Channel the frame was captured on
  3. The channel of the AP to which the protocol analyzer is associated
  4. The channel reported in the channel field of the PHY header

Question 20

When the Protected bit in the Frame Control field of the MAC header is set to 0, it always indicates:

  1. This is an RSN
  2. Encryption is not enabled for the entire BSS
  3. The frame body is unencrypted
  4. The AP is not operating in FIPS mode