Latest Sep 13, 2026 Real CWAP-405 Exam Dumps Questions Valid CWAP-405 Dumps PDF
CWNP CWAP-405 Exam Dumps - PDF Questions and Testing Engine
NEW QUESTION # 29
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 2.4 GHz radio configuration
- B. The 5 GHz radio configuration
- C. the Ethernet uplink and the network infrastructure
- D. The antennas used on the client devices
Answer: C
NEW QUESTION # 30
You are using a laptop-based protocol analyzer to scan all channels and determine the basic configuration of the WLAN Basic Service Set in your facility. You are scanning all channels. All configured with default settings.
What can you change to cause the scan to run faster while still APs are capturing beacon frames on all the channels?
- A. Configure the RBW to more than 120 kHz
- B. Configure the scan time for channels to <100 ms
- C. Configure the fragmentation threshold to 1500 bytes
- D. Configure the scan time for channels to 300-500 ms
Answer: A
NEW QUESTION # 31
What is an AIFS?
- A. A medium access method introduced by 802.lln, but never implemented
- B. A variable Interframe Space introduced by 802.lie to help prioritize medium access for different Access Categories
- C. A form of aggregation performed at the PHY layer based on 802.lie UP values interpreted from DSCP values
- D. The shortest period of time a STA can sleep
Answer: B
Explanation:
An AIFS is a variable interframe space introduced by 802.11e to help prioritize medium access for different Access Categories (ACs). An interframe space is a period of time that a STA (station) has to wait before attempting to access the medium. An AIFS is a type of interframe space that varies depending on the AC of the traffic. An AC is a logical queue that corresponds to a QoS (Quality of Service) level for different types of traffic. There are four ACs defined by 802.11e: AC_VO (Voice), AC_VI (Video), AC_BE (Best Effort), and AC_BK (Background). Each AC has a different AIFSN (Arbitration Interframe Space Number) value, which determines how long it has to wait before attempting to access the medium. A lower AIFSN value means a higher priority and a shorter waiting time. The other options are not correct, as they do not describe what an AIFS is. An AIFS is not a medium access method introduced by 802.11n, but never implemented, as it is part of the 802.11e standard and widely used in QoS-enabled WLANs. An AIFS is not a form of aggregation performed at the PHY layer based on 802.11e UP values interpreted from DSCP values, as aggregation is a technique that combines multiple frames into one larger frame to improve efficiency and throughput, not prioritization or medium access. An AIFS is not the shortest period of time a STA can sleep, as sleeping is a power saving mode that allows a STA to conserve battery power by periodically turning off its radio, not accessing the medium. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 7:
QoS Analysis, page 194-195
NEW QUESTION # 32
Given: The Frame Check Sequence (FCS) is a 32 CRC used for error detection.
The CRC is calculated over what?
- A. PHY Header and Mac Header only
- B. Mac Header and Frame Body only
- C. PHY Header, MAC Header and Frame Body
- D. Frame Body only
Answer: B
Explanation:
The Frame Check Sequence is calculated over the entire MAC frame, which includes the MAC header and the frame body. It does not include any PHY-layer fields because the FCS is part of the MAC frame and is generated before the PHY encapsulates the data into a PPDU for transmission.
NEW QUESTION # 33
What is the difference between a Data frame and a QoS-Data frame?
- A. QoS Data frames include a DSCP control field
- B. QoS Data frames include a QoS control field
- C. QoS Data frames include a QoS information element
- D. QoS Data frames include an 802.1Q VLAN tag
Answer: B
Explanation:
QoS Data frames include an additional QoS Control field in the MAC header. This field carries traffic priority and related QoS parameters used for Enhanced Distributed Channel Access (EDCA), enabling differentiated handling of traffic categories such as voice, video, best effort, and background.
NEW QUESTION # 34
An RTS frame should be acknowledged by which frame?
- A. Ack
- B. Block Ack
- C. RTS-Ack
- D. CTS
Answer: D
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-405], Chapter 6: 802.11 Frame Exchanges, page 166-167
NEW QUESTION # 35
Given: Protocol analyzer often have useful graphical dashboards providing information about the health and operations of the WLAN.
What is a valid use of a graph showing the Top APs Based on Active Associations?
- A. Evaluating the capacity handling on a specific channel
- B. Ensuring compliance with corporate security policies
- C. Locating overloaded APs
- D. Discovering the total number of client STAs on your network
Answer: C
NEW QUESTION # 36
What is the default 802.11 authentication method for a STA when using Pre-RSNA?
- A. PSK
- B. Open System
- C. 4-Way Handshake
- D. Shared Key
Answer: B
Explanation:
The default 802.11 authentication method for a STA when using Pre-RSNA is Open System. This is the simplest and most common authentication method, which does not provide any security or encryption. In Open System authentication, the STA sends an Authentication Request frame to the AP, and the AP responds with an Authentication Response frame with a status code of success. After this, the STA can proceed to association with the AP . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 181; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 183.
NEW QUESTION # 37
Which one of the following tools would be the best to most accurately measure the noise floor?
- A. OS Utilities
- B. WLAN Scanner
- C. Protocol Analyzer
- D. Spectrum Analyzer
Answer: D
Explanation:
A spectrum analyzer directly measures RF energy across the frequency range, providing the most accurate measurement of the noise floor. This is essential for identifying interference and assessing channel conditions.
NEW QUESTION # 38
An RTS frame should be acknowledged by which frame?
- A. BlockAck
- B. Ack
- C. RTS-Ack
- D. CTS
Answer: D
Explanation:
An RTS frame is acknowledged with a CTS frame as part of the RTS/CTS exchange mechanism.
The CTS confirms that the medium is reserved and allows the sender to proceed with transmitting the data frame.
NEW QUESTION # 39
What is the function of 802.11 Management frames?
- A. Manage the flow of data
- B. Prioritize network administration traffic
- C. Communicate configuration changes between WLAN controller and APs
- D. Manage the BSS
Answer: D
Explanation:
802.11 Management frames are used to establish, maintain, and terminate wireless connections within a Basic Service Set. They handle functions such as discovery (Beacon and Probe), authentication, association, and disassociation, which collectively manage the operation and structure of the BSS.
NEW QUESTION # 40
VoIP is used heavily in your organization. You must troubleshoot problems with dropped calls on the WLAN.
What is a common cause of dropped calls when using Wi-Fi VoIP phones?
- A. Data rates below 54 Mbps
- B. Slow roaming
- C. Data rates below 75 Mbps
- D. Use of WMM
Answer: B
NEW QUESTION # 41
When would you expect to see a Reassociation Request frame'
- A. Only when a STA is using FT roaming
- B. Every time a STA roams
- C. Every time a STA associates to an AP to which it has previously been associated
- D. Only when a STA roams back to an AP it has previously been associated with
Answer: B
Explanation:
A Reassociation Request frame is sent every time a STA roams from one AP to another within the same ESS.
A Reassociation Request frame is similar to an Association Request frame, but it also contains the BSSID of the current AP that the STA is leaving. This allows the new AP to coordinate with the old AP and transfer the STA's context information, such as security keys, QoS parameters, and buffered frames. This way, the STA can maintain its connectivity and session continuity during roaming . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 195; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 196.
NEW QUESTION # 42
Which statement is true regarding VHT Transmit Beamforming?
- A. The beamformee calculates both the feedback and steering matrix
- B. The beamformer calculates both the feedback and steering matrix
- C. The beamformee calculates the feedback matrix and the beamformer calculates the steering matrix
- D. The beamformee calculates the steering matrix and the beamformer calculates the feedback matrix
Answer: C
Explanation:
In VHT Transmit Beamforming, the beamformee (client) measures the channel and calculates the feedback matrix, which it sends to the beamformer (AP). The beamformer then uses this information to compute the steering matrix to optimize the transmitted signal for the beamformee.
NEW QUESTION # 43
In which element of a Beacon frame would you look to identity the current HT protection mode in which an AP is operating?
- A. HT Protection Element
- B. HT Capabilities Element
- C. HT Operations Element
- D. ERP Information Element
Answer: C
Explanation:
The HT protection mode in which an AP is operating can be identified by looking at the HT Operations element in a Beacon frame. The HT Operations element is a part of the Beacon frame that contains information about the High Throughput (HT) capabilities and operation of an 802.11n BSS. The HT Operations element has a field called HT Protection, which indicates how the BSS protects its HT transmissions from interference or collisions with non-HT devices or BSSs. The HT Protection field can have four values: No Protection, Nonmember Protection, 20 MHz Protection, or Non-HT Mixed Mode. The other options are not correct, as they do not contain information about the HT protection mode. The HT Protection element does not exist, the ERP Information element is used for Extended Rate PHY (ERP) protection mode for 802.11g devices, and the HT Capabilities element is used for indicating the supported HT features of an individual device. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 5: 802.11 MAC Sublayer, page 125-126
NEW QUESTION # 44
When configuring a long-term, forensic packet capture and saving all packets to disk which of the following is not a consideration?
- A. Analyzer location
- B. Real-time packet decodes
- C. Individual trace file size
- D. Total capture storage space
Answer: B
Explanation:
In long-term forensic captures, the priority is reliably capturing and storing all packets without loss. Considerations such as total storage capacity, file size management, and analyzer placement directly affect data retention and capture integrity. Real-time packet decoding is not required because analysis can be performed later on the saved data, making it unnecessary during continuous forensic collection.
NEW QUESTION # 45
What is the function of the PHY layer?
- A. Convert PPDUs to MSDUs for transmissions and MSDUs to PPDUs for receptions
- B. Convert PPDUs to PSDUs for transmissions and PSDUs to PPDUs for receptions
- C. Convert MSDUs to PPDUs for transmissions and PPDUs to MSDUs for receptions
- D. Convert PSDUs to PPDUs for transmissions and PPDUs to PSDUs for receptions
Answer: D
Explanation:
The PHY layer is responsible for taking the PSDU received from the MAC layer and encapsulating it into a PPDU for transmission over the RF medium. Upon reception, it decodes the received PPDU and extracts the PSDU to pass up to the MAC layer. This conversion between PSDUs and PPDUs is the core framing function of the PHY layer.
NEW QUESTION # 46
Both 802.11k and 802.11v make use of Neighbor report elements to inform STAs about neighboring BSS networks. In which type of Management frame would you find Neighbor report elements?
- A. Association Response
- B. Probe Response
- C. Action
- D. Authentication Request
Answer: C
Explanation:
Neighbor report elements used by 802.11k (Radio Resource Measurement) and 802.11v (BSS Transition Management) are carried in Action frames. These frames allow the AP to provide clients with information about neighboring BSSs to assist in roaming decisions.
NEW QUESTION # 47
What is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY?
- A. VHT PPDU
- B. HE TB PPDU
- C. HE MU PPDU
- D. HE SU PPDU
Answer: B
Explanation:
In 802.11ax, an MU-RTS trigger frame schedules uplink transmissions from multiple stations. The stations respond using an HE Trigger-Based PPDU, which is specifically designed for coordinated uplink transmissions in OFDMA-based operation. This format allows multiple clients to transmit simultaneously in assigned resource units under AP control.
NEW QUESTION # 48
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