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CWNP CWAP-404 Exam Syllabus Topics:
| Topic |
Details |
| Topic 1 |
- MAC Sublayer and Functions: The topic measures the ability of a wireless network professional to understand and analyze the MAC layer operations. Candidates are expected to validate BSS configurations and identify issues like CRC errors and retransmissions, ensuring they can maintain the integrity and performance of the WLAN.
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| 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.
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| Topic 3 |
- Protocol Analysis: The topic in the CWNP CWAP-404 Exam evaluates the skill of a wireless network professional to capture and analyze 802.11 frames effectively. Candidates must demonstrate proficiency in configuring protocol analysis tools, interpreting frame captures to diagnose issues, and applying appropriate troubleshooting methods.
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CWNP CWAP-404 Exam Certification Details:
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CWNP Certified Wireless Analysis Professional Sample Questions (Q138-Q143):
NEW QUESTION # 138
An RTS frame should be acknowledged by which frame?
- A. Block Ack
- B. Ack
- C. CTS
- D. RTS-Ack
Answer: C
Explanation:
Explanation
An RTS (Request to Send) frame should be acknowledged by a CTS (Clear to Send) frame. An RTS and CTS frame are types of control frames that are used to implement a virtual carrier sense mechanism called RTS/CTS. RTS/CTS is a technique that helps to avoid collisions and hidden node problems in wireless transmissions. When a STA (station) wants to send a data frame, it first sends an RTS frame to the intended receiver, indicating the duration of the transmission. The receiver then responds with a CTS frame, also indicating the duration of the transmission. The other STAs in the vicinity hear either the RTS or the CTS frame and update their NAV (Network Allocation Vector) timers accordingly, deferring their access to the medium until the transmission is over. The sender then sends the data frame, followed by an ACK (Acknowledgement) frame from the receiver. The other options are not correct, as they are not used to acknowledge an RTS frame. An ACK frame is used to acknowledge a data frame, not an RTS frame. An RTS-Ack frame does not exist, as there is no such type of control frame in 802.11. A Block Ack (BA) frame is used to acknowledge multiple data frames in a single frame, not an RTS frame. References: [Wireless Analysis Professional Study Guide CWAP-404], Chapter 6: 802.11 Frame Exchanges, page 166-167
NEW QUESTION # 139
What MAC layer information will a dual-band 802.11n protocol analyzer capture if it is capturing data frames encrypted with WPA2-Enterprise? (Choose 2)
- A. Null Data frames
- B. Short Interframe Spaces
- C. TCP SYN datagram
- D. Source IP Address
- E. Legacy Signal field
- F. Sequence Control fields
Answer: A,F
NEW QUESTION # 140
You have implemented an AP at a remote office. It is a single-band AP supporting 802.11ac.
Several users complain that their laptops cannot connect to the WLAN. These laptops are from multiple vendors and range in age from 2 to 4 years. The SSID and security profile settings are correct. All default settings were used on the AP with the exception of the SSID and security settings. What is the most likely issue preventing these STAs from connecting to the AP?
- A. They do not support the basic data rates
- B. They are 2.4 GHz-only devices
- C. They are 5 GHz-only devices
- D. They do not support VHI and only support OFDM
Answer: B
Explanation:
Since the AP is a single-band AP supporting 802.11ac, it operates only on the 5 GHz band. If the laptops are 2.4 GHz-only devices, they will not be able to connect because they do not support the 5 GHz band that the AP is operating on. This is likely the issue preventing these older devices from connecting to the WLAN.
NEW QUESTION # 141
You have been recently hired as the wireless network administrator for an organization spread across seven locations. They have deployed more than 100 APs, but they have not been managed in either an automated or manual process for more than 18 months.
Given this length of time, what is one of the first things you should evaluate from a support perspective?
- A. The channels in use
- B. The firmware revision
- C. The data rates allowed
- D. The VLANs in use
Answer: B
NEW QUESTION # 142
You are troubleshooting throughput problems for a WLAN cell. The cell is provisioned with an
802.11ac dual-band AP. Users connected with both 5 GHz and 2.4 GHz connections are reporting performance problems. The AP settings are properly optimized. No interface issues have been detected (either co- channel interference or non-Wi-Fi interference) and the number of associated users is low.
What should you analyze to resolve the issue?
- A. The 5 GHz radio configuration
- B. The antennas used on the client devices
- C. the Ethernet uplink and the network infrastructure
- D. The 2.4 GHz radio configuration
Answer: C
NEW QUESTION # 143
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