CWAP-404 RELIABLE EXAM VCE | RELIABLE CWAP-404 EXAM PREPARATION

CWAP-404 Reliable Exam Vce | Reliable CWAP-404 Exam Preparation

CWAP-404 Reliable Exam Vce | Reliable CWAP-404 Exam Preparation

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CWNP CWAP-404 Exam Syllabus Topics:

TopicDetails
Topic 1
  • WLAN Medium Access: The exam evaluates the understanding of a wireless network professional about 802.11 contention algorithms and their impact on WLAN performance. The CWAP-404 exam requires candidates to analyze QoS configurations and operations.
Topic 2
  • PHY Layers and Technologies: In the topic, the CWAP-404 exam tests the understanding of a wireless network professional about the Physical (PHY) layer functions and technologies. Wireless analysts need to describe and apply knowledge of PHY headers, PPDUs, and other PHY-related data. This topic ensures that analysts are proficient in interpreting PHY information within protocol analyzers and can select appropriate capture devices for different PHY types.
Topic 3
  • Frame Exchanges: The topic evaluates the skills of a wireless network professional in capturing, understanding, and analyzing various frame exchanges, including BSS discovery, joining, roaming, and data frames. The CWAP-404 Exam targets the ability of candidates to troubleshoot and resolve issues related to MAC layer operations, ensuring they can maintain robust and efficient WLAN communications.

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CWNP Certified Wireless Analysis Professional Sample Questions (Q167-Q172):

NEW QUESTION # 167
Which one of the these is the most important in the WLAN troubleshooting methodology among those listed?

  • A. Interview the network manager about the issues being experienced
  • B. Obtain detailed knowledge of the wireless vendors debug and logging options
  • C. Observe the problem
  • D. Talk to the end users about their experiences

Answer: C

Explanation:
Observing the problem is the most important step in the WLAN troubleshooting methodology among those listed. This step involves capturing and analyzing the relevant data from the wireless network, such as packets, frames, spectrum, and performance metrics. Observing the problem helps to verify the existence and scope of the issue, identify the root cause and possible solutions, and validate the results of any actions taken. The other steps are also important, but they are not as critical as observing the problem.


NEW QUESTION # 168
When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

  • A. Frame body and MAC Header
  • B. Frame body including the LLCPDU
  • C. The whole MPDU
  • D. Frame body excluding the LLCPDU

Answer: B

Explanation:
Explanation
When a data frame is encrypted with WPA2, the encryption is applied to the frame body including the LLCPDU. The LLCPDU (Logical Link Control Protocol Data Unit) is a part of the frame body that contains information such as protocol type, source and destination service access points (SAPs), and control fields. The LLCPDU is added by the LLC (Logical Link Control) sublayer to provide multiplexing and flow control functions for different upper layer protocols. When a data frame is encrypted with WPA2, which uses AES-CCMP as its encryption algorithm, both the payload and the LLCPDU are encrypted as a single unit. The MAC header and FCS are not encrypted, as they are needed for addressing and error detection purposes. References: [Wireless Analysis Professional Study Guide CWAP-404], Chapter 5: 802.11 MAC Sublayer, page 115-116


NEW QUESTION # 169
The data rate for a data frame is 150 Mbps in 5 GHz.
What rate is used to transmit the PHY header information?

  • A. 1 Mbps
  • B. 6 Mbps
  • C. 75 Mbps
  • D. 150 Mbps

Answer: A


NEW QUESTION # 170
Which one of the following is an advantage of using display filters that is not an advantage of capture-time filters?

  • A. Multiple of them can be applied simultaneously
  • B. They only hide the packets from view and the filtered packets can be enabled for view later
  • C. They allow for focused analysis on just the packets of interest
  • D. Once created they are reusable for later captures

Answer: B

Explanation:
Display filters are applied after the capture is completed and they only hide the packets from view. The filtered packets are still present in the capture file and can be enabled for view later by changing or removing the display filter. This is an advantage over capture-time filters, which discard the packets that do not match the filter criteria and cannot be recovered later.


NEW QUESTION # 171
What is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY?

  • A. HE SU PPDU
  • B. HE TB PPDU
  • C. VHT PPDU
  • D. HE MU PPDU

Answer: B

Explanation:
An HE TB PPDU (High Efficiency Trigger-Based Packet Data Unit) is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY (Physical Layer). An MU- RTS trigger frame is a frame that initiates a multi-user transmission opportunity (MU-TXOP) by requesting multiple stations (STAs) to send clear-to-send (CTS) frames on different spatial streams or resource units (RUs). An HE TB PPDU is a frame that contains data from multiple STAs that have been allocated RUs by an MU-RTS trigger frame or another type of trigger frame.
An HE SU PPDU (High Efficiency Single User Packet Data Unit) is a frame that contains data from a single STA using all available spatial streams or RUs. An HE MU PPDU (High Efficiency Multi User Packet Data Unit) is a frame that contains data from multiple STAs using different spatial streams or RUs without being triggered by another frame. A VHT PPDU (Very High Throughput Packet Data Unit) is a frame that uses the 802.11ac PHY and does not support multi- user transmissions.


NEW QUESTION # 172
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