Vce CWNP CWAP-405 Download - Practice CWAP-405 Tests

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CWNP CWAP-405 Exam Syllabus Topics:

SectionObjectives
RF and PHY Layer Analysis- RF Propagation and Signal Behavior
- 802.11 PHY Standards Overview
- Channelization and Spectrum Usage
Spectrum Analysis and Tools- Spectrum Analyzer Usage
- Interference Identification (Wi-Fi and Non-Wi-Fi)
- Wireshark and Packet Capture Analysis
WLAN Protocol Analysis- Frame Types and Exchanges (Management, Control, Data)
- 802.11 Frame Structure and Fields
- MAC Layer Operations and Behaviors
Wireless Troubleshooting and Performance Analysis- Identifying WLAN Performance Issues
- Throughput and Latency Analysis
- Common WLAN Failure Scenarios

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CWNP Certified Wireless Analysis Professional Sample Questions (Q23-Q28):

NEW QUESTION # 23
What is the function of the PHY Preamble?

Answer: D

Explanation:
The PHY preamble enables receivers to detect the presence of an incoming transmission and synchronize to it in time and frequency. It provides the necessary information for signal detection, automatic gain control adjustment, timing alignment, and channel estimation so that the receiver can correctly decode the remainder of the frame.


NEW QUESTION # 24
Which one of the following is not a valid acknowledgement frame?

Answer: A

Explanation:
An RTS frame is used to request access to the medium and initiate an RTS/CTS exchange. It does not acknowledge receipt of a previous frame. CTS, Ack, and Block Ack are all valid acknowledgment mechanisms used to confirm receipt of transmissions.


NEW QUESTION # 25
Which one of the following protocol analyzer features do not make protocol trace files easier to read?

Answer: A

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.


NEW QUESTION # 26
A client is operating in an unstable RF environment. Out of five data frames transmitted to the client it only receives four. The client sends a Block Ack to acknowledge the receipt of these four frames but due to frame corruption the Block Ack is not received by the AP. Which frames will be retransmitted?

Answer: A

Explanation:
If the AP does not receive the Block Ack, it has no confirmation of which MPDUs were successfully received within the block. Without that acknowledgment, the transmitter must assume delivery failure for the outstanding frames and retransmit the entire burst to ensure reliable delivery.


NEW QUESTION # 27
What is encrypted within the third message of the 4-Way Handshake?

Answer: D

Explanation:
The GTK (Group Temporal Key) is encrypted within the third message of the 4-Way Handshake. The 4-Way Handshake is a process that establishes a secure connection between a STA (station) and an AP (access point) using WPA2 (Wi-Fi Protected Access 2), which is a security protocol that uses AES-CCMP (Advanced Encryption Standard-Counter Mode CBC-MAC Protocol) as its encryption algorithm. The 4-Way Handshake consists of four messages that are exchanged between the STA and the AP. The first message is sent by the AP to the STA, containing the ANonce (Authenticator Nonce), which is a random number generated by the AP. The second message is sent by the STA to the AP, containing the SNonce (Supplicant Nonce), which is a random number generated by the STA, and the MIC (Message Integrity Code), which is a value that verifies the integrity of the message. The third message is sent by the AP to the STA, containing the GTK, which is a key that is used to encrypt and decrypt multicast and broadcast data frames, and the MIC. The GTK is encrypted with the KEK (Key Encryption Key), which is derived from the PTK (Pairwise Temporal Key).
The PTK is a key that is used to encrypt and decrypt unicast data frames, and it is derived from the PMK (Pairwise Master Key), the ANonce, and the SNonce. The fourth message is sent by the STA to the AP, containing only the MIC, to confirm the completion of the 4-Way Handshake. The other options are not correct, as they are not encrypted within the third message of the 4-Way Handshake. The PMK is a key that is derived from a passphrase or obtained from an authentication server, and it is not transmitted in any message of the 4-Way Handshake. The PTK is a key that is derived from the PMK, the ANonce, and the SNonce, and it is not transmitted in any message of the 4-Way Handshake. The GMK (Group Master Key) is a key that is generated by the AP and used to derive the GTK, and it is not transmitted in any message of the 4-Way Handshake. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 8: Security Analysis, page 211-213


NEW QUESTION # 28
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