CWNP Certified Wireless Analysis Professional CWAP-405 Dumps in PDF

Free CWNP CWAP-405 Real Questions (page: 5)

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

Answer(s): C

Explanation:

On channel 36 (5 GHz band), the PHY header is always transmitted using one of the basic OFDM rates to ensure all devices can decode it. For 802.11a/n/ac in 5 GHz, the PHY header is sent at 6 Mbps, regardless of the MCS rate used for the data portion of the frame.



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

Answer(s): A

Explanation:

In 802.11ax (Wi-Fi 6), the PHY header includes a Station ID (STA-ID) to identify which stations are assigned to specific Resource Units (RUs) during OFDMA multi-user transmissions. This allows multiple clients to be scheduled and coordinated efficiently at the PHY layer.



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

Answer(s): B

Explanation:

The channel number shown in the radio tap header reflects the channel setting of the capture adapter at the time the frame was received. It indicates where the analyzer was listening, not necessarily the channel declared in the PHY header or used by the transmitting AP.



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

Answer(s): C

Explanation:

The Protected Frame bit in the Frame Control field indicates whether the frame body is encrypted. A value of 0 means the frame body is unencrypted, while a value of 1 means it is encrypted.



You are exploring the packet decode of an 802.11 data frame and notice the To DS and From DS bits of the Frame Control field are both set to 1. Assuming the frame does not have a CRC error, what can you conclude about this frame?

  1. The frame is a retransmission.
  2. The frame has been transmitted on an Ad-Hoc network.
  3. This is non-standard 802.11 behavior and this frame must be part of the proprietary feature.
  4. The frame was transmitted between two WLAN infrastructure devices such as WLAN bridges or Mesh APs.

Answer(s): D

Explanation:

When both To DS and From DS bits are set to 1, it indicates a wireless distribution system (WDS) frame. These are used when frames are forwarded between infrastructure devices like APs in a mesh network or wireless bridge, not between clients and APs.



Which is not a valid interpretation for one of the 4 address fields in the MAC header?

  1. Source address
  2. Receiver address
  3. Transmitter address
  4. Sender address

Answer(s): D

Explanation:

The 802.11 MAC header can contain up to four addresses: source address (SA), transmitter address (TA), receiver address (RA), and destination address (DA). "Sender address" is not a defined field in the standard, making it invalid.



In an infrastructure network, which statement is true concerning the “Power Management” bit and “More Data” bit in the Frame Control field of the MAC header?

  1. The “Power Management” bit should only be set by a client STA and the “More Data” bit should only be set by the AP.
  2. The “Power Management” bit should only be set by the AP and the “More Data” bit should only be set by a client STA.
  3. The “Power Management” bit and the “More Data” bit should only be set by the AP.
  4. The “Power Management” bit and the “More Data” bit should only be set by a client STA.

Answer(s): A

Explanation:

In an infrastructure WLAN, the client STA sets the Power Management bit to signal when it is entering or exiting power save mode. The AP sets the More Data bit to indicate that additional buffered frames are waiting for a client STA, allowing proper coordination of frame delivery.



Which one of the following protocol analyzer features do not make protocol trace files easier to read?

  1. Filtering
  2. Colorization
  3. Naming nodes
  4. Packet slicing

Answer(s): D

Explanation:

Packet slicing reduces the captured frame size to protect sensitive data but does not improve readability of the trace. Features like filtering, colorization, and naming nodes directly help analysts focus on relevant frames and understand communication patterns more easily.



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