Valid CWAP-404 Test Topics & CWAP-404 Latest Exam Dumps

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CWNP CWAP-404 Exam Certification Details:

Duration	90 minutes
Passing Score	70%
Exam Name	Wireless Analysis Professional
Sample Questions	CWNP CWAP-404 Sample Questions

CWNP CWAP-404 Exam Topics:

Section	Objectives
Protocol Analysis - 15%
Capture 802.11 frames using the appropriate methods	- Select capture devices Laptop protocol analyzers APs, controllers, and other management solutions Specialty devices (hand-held analyzers and custom-built devices) - Install monitor mode drivers - Select capture location(s) - Capture sufficient data for analysis - Capture all channels or capture on a single channel as needed - Capture roaming events
Understand and apply the common capture configuration parameters available in protocol analysis tools	- Save to disk - Packet slicing - Event triggers - Buffer options - Channels and channel widths - Capture filters - Channel scanning and dwell time
Analyze 802.11 frame captures to discover problems and find solutions	- Use appropriate display filters to view relevant frames and packets - Use colorization to highlight important frames and packets - Configure and display columns for analysis purposes - View frame and packet decodes while understanding the information shown and applying it to the analysis process - Use multiple adapters and channel aggregation to view captures from multiple channels - Implement protocol analyzer decryption procedures - View and use a capture’s statistical information for analysis - Use expert mode for analysis - View and understand peer maps as they relate to communications analysis
Utilize additional tools that capture 802.11 frames for analysis and troubleshooting	- WLAN scanners and discovery tools - Protocol capture visualization and analysis tools - Centralized monitoring, alerting, and forensic tools
Ensure appropriate troubleshooting methods are used with all analysis types	- Define the problem - Determine the scale of the problem - Identify probable causes - Capture and analyze the data - Observe the problem - Choose appropriate remediation steps - Document the problem and resolution
Spectrum Analysis - 10%
Capture RF spectrum data and understand the common views available in spectrum analyzers	- Install, configure, and use spectrum analysis software and hardware - Capture RF spectrum data using handheld, laptop-based, and infrastructure spectrum capture solutions - Understand and use spectrum analyzer views Real-time FFT Waterfall, swept spectrogram, density, and historic views Utilization and duty cycle Detected devices WLAN integration views
Analyze spectrum captures to identify relevant RF information and issues	- RF noise floor in an environment - Signal-to-Noise Ratio (SNR) for a given signal - Sources of RF interference and their locations - RF channel utilization - Non-Wi-Fi transmitters and their impact on WLAN communications - Overlapping and non-overlapping adjacent channel interference - Poor performing or faulty radios
Analyze spectrum captures to identify various device signatures	- Identify various 802.11 PHYs DSSS OFDM OFDMA Channel widths Primary channel - Identify non-802.11 devices based on RF behaviors and signatures Frequency hopping devices IoT devices Microwave ovens Video devices RF Jammers Cordless phones
Use centralized spectrum analysis solutions	- AP-based spectrum analysis - Sensor-based spectrum analysis
PHY Layers and Technologies - 10%
Understand and describe the functions of the PHY layer and the PHY protocol data units (PPDUs)	- DSSS (Direct Sequence Spread Spectrum) - HR/DSSS (High Rate/Direct Sequence Spread Spectrum) - OFDM (Orthogonal Frequency Division Multiplexing) - ERP (Extended Rate PHY) - HT (High Throughput) - VHT (Very High Throughput) - HE (High Efficiency) HE SU PPDU HE MU PPDU HE ER SU PPDU HE TB PPDU HE NULL data packets
Apply the understanding of PHY technologies, including PHY headers, preambles, training fields, frame aggregation, and data rates, to captured data
Identify and use PHY information provided within pseudo-headers in protocol analyzers	- Pseudo-Header formats Radiotap Per Packet Information (PPI) - Key pseudo-header content Guard intervals Resource units allocation PPDU formats Signal strength Noise Data rate and MCS index Length information Channel center frequency or received channel Channel properties
Recognize the limits of protocol analyzers to capture PHY information including NULL data packets and PHY headers
Use appropriate capture devices based on proper understanding of PHY types	- Supported PHYs - Supported spatial streams
MAC Sublayer and Functions - 25%
Understand frame encapsulation and frame aggregation	- Frame aggregation (A-MSDU and A-MPDU)
Identify and use MAC information in captured data for analysis	- Management, Control, and Data frames - MAC frame formats and contents Frame Control field To DS and From DS fields Address fields Frame Check Sequence (FCS) field - 802.11 Management frame formats Information Elements Authentication Association and Reassociation Beacon Prove Request and Probe Response - Data and QoS Data frame formats - 802.11 Control frame formats Acknowledgement (ACK) Request to Send/Clear to Send (RTS/CTS) Block Acknowledgement and related frames Trigger frames VHT/HE NDP announcements Multiuser RTS
Validate BSS configuration through protocol analysis	- Country code - Minimum basic rate - Supported rates and coding schemes - Beacon interval - WMM settings - RSN settings - HT/VHT/HE operations - Channel width - Primary channel - Hidden or non-broadcast SSIDs
Identify and analyze CRC error frames and retransmitted frames

>> Valid CWAP-404 Test Topics <<

CWAP-404 Latest Exam Dumps | CWAP-404 Training Materials

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CWNP Certified Wireless Analysis Professional Sample Questions (Q132-Q137):

NEW QUESTION # 132
Which one of the following portions of information is communicated in the PHY Header?

A. Signal strength
B. SNR
C. Noise
D. Date rate

Answer: D

Explanation:
One of the information that is communicated by bits in the PHY header is data rate. Data rate is the speed at which data is transmitted or received over the wireless medium. Data rate depends on factors such as modulation, coding, channel width, spatial streams, and guard interval. Data rate is indicated by bits in different fields of the PHY header, depending on the type of PPDU (e.g., OFDM, HT, VHT, HE). The receiver uses these bits to determine how to decode and demodulate the rest of the PPDU. The other options are not correct, as they are not communicated by bits in the PHY header. SNR (Signal-to-Noise Ratio), noise, and signal strength are measured by the receiver based on its own capabilities and environment.

NEW QUESTION # 133
With what access category's parameters are WLAN multicast video frames transmitted when the EDCAF is in use by the transmitting station?

A. AC_VI
B. AC_VO
C. AC_BK
D. AC_BE

Answer: B

Explanation:
AC_VO (Voice and Video) is the access category reserved for high-priority, low-latency traffic, such as voice and video calls.

NEW QUESTION # 134
How is the length of an AIFS calculated?

A. SIFS * Slot Time + AIFSN
B. AIFSN * Slot Time + SIFS
C. SIFS + AIFS * Time Unit
D. DIFS + SIFS + AIFSN

Answer: B

Explanation:
Explanation
The length of an AIFS (Arbitration Interframe Space) is calculated by multiplying the AIFSN (Arbitration Interframe Space Number) by the Slot Time and adding the SIFS (Short Interframe Space). An AIFS is a variable interframe space introduced by 802.11e to help prioritize medium access for different Access Categories (ACs). An AC is a logical queue that corresponds to a QoS (Quality of Service) level for different types of traffic. Each AC has a different AIFSN 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 Slot Time is a fixed value that depends on the PHY type and channel width. The SIFS is the shortest interframe space that is used for high-priority transmissions, such as ACKs or CTSs. The formula for calculating the AIFS length is: AIFS = AIFSN * Slot Time + SIFS. References: [Wireless Analysis Professional Study Guide CWAP-404], Chapter 7: QoS Analysis, page 194-195

NEW QUESTION # 135
During a VHT Transmit Beamforming sounding exchange, the beamformee transmits a Compressed Beamforming frame to the beamformer. What is communicated within this Compressed Beamforming frame?

A. Beamforming Matrix
B. Steering Matrix
C. Feedback Matrix
D. Beamformee Matrix

Answer: C

Explanation:
The beamformee transmits a Feedback Matrix within the Compressed Beamforming frame to the beamformer. The Feedback Matrix contains information about the channel state between the beamformee and each spatial stream of the beamformer. This information is used by the beamformer to adjust its transmit weights and optimize its signal for the beamformee.

NEW QUESTION # 136
How is the length of an AIFS is calculated?

A. SIFS * Slot Time + AIFSN
B. AIFSN * Slot Time + SIFS
C. SIFS + AIFS * Time Unit
D. DIFS + SIFS + AIFSN

Answer: B

Explanation:
The length of an AIFS (Arbitration Interframe Space) is calculated by multiplying the AIFSN (Arbitration Interframe Space Number) by the Slot Time and adding the SIFS (Short Interframe Space). An AIFS is a variable interframe space introduced by 802.11e to help prioritize medium access for different Access Categories (ACs). An AC is a logical queue that corresponds to a QoS (Quality of Service) level for different types of traffic. Each AC has a different AIFSN 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 Slot Time is a fixed value that depends on the PHY type and channel width. The SIFS is the shortest interframe space that is used for high-priority transmissions, such as ACKs or CTSs. The formula for calculating the AIFS length is: AIFS = AIFSN * Slot Time + SIFS.

NEW QUESTION # 137
......

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Protocol Analysis - 15%

Spectrum Analysis - 10%

PHY Layers and Technologies - 10%

MAC Sublayer and Functions - 25%

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