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CWNP CWAP-404 Exam Certification Details:

Duration	90 minutes
Exam Price	$275 USD
Recommended Training	CWAP self-paced training kit, Training Class
Exam Registration	PEARSON VUE
Number of Questions	60
Passing Score	70%
Exam Code	CWAP-404 CWAP
Sample Questions	CWNP CWAP-404 Sample Questions

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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

CWNP Certified Wireless Analysis Professional Sample Questions (Q123-Q128):

NEW QUESTION # 123
Which piece of information Is not transmitted in an HT PDDU header?

A. Number of Spatial Streams
B. Channel number
C. PPDU length
D. MCS index

Answer: B

Explanation:
The channel number is not transmitted in an HT PPDU header. An HT PPDU header is a part of the PPDU that contains information such as modulation, coding, data rate, and number of spatial streams for an 802.11n transmission. The channel number is not included in the HT PPDU header, as it is determined by the frequency band and channel width that are used by the transmitter and receiver. The channel number can be inferred from the frequency band and channel width, which are indicated by bits in different fields of the HT PPDU header, such as HT- SIG and HT-LTF. The other options are not correct, as they are transmitted in an HT PPDU header. The number of spatial streams, PPDU length, and MCS index are indicated by bits in the HT-SIG field of the HT PPDU header.

NEW QUESTION # 124
802.11k Neighbor Requests and Neighbor Reports are sent in what type of Management Frames?

A. Action
B. Reassociation Request and Reassociation Response
C. Beacon
D. RRM

Answer: A

Explanation:
802.11k Neighbor Requests and Neighbor Reports are sent in Action frames. An Action frame is a Management frame that is used to perform various operations or functions related to the operation or maintenance of a wireless network. An Action frame consists of a Category field that indicates the type of action being performed, and a variable-length Action Details field that contains specific information related to the action. For example, an Action frame with a Category field value of 5 indicates a Radio Measurement action, and the Action Details field may contain a Neighbor Request or a Neighbor Report subelement.

NEW QUESTION # 125
With what access category's parameters are WLAN multicast video frames transmitted when the EDCAF is in use by the transmitting station?

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

Answer: A

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 # 126
The network administrator at ABC Engineering has taken a large packet capture from one of their APs running in monitor mode. She has very little knowledge of 802.11 protocols but would like to use the capture file to evaluate the overall health and performance of their wireless network. When she asks your advice, which tool do you recommend she opens the packet capture file with?

A. Capture visualization tool
B. Spectrum analyzer
C. WLAN scanner
D. Python

Answer: A

Explanation:
Explanation
A capture visualization tool is a software application that can open a packet capture file and display various graphs, charts, tables, and statistics that illustrate the characteristics and behavior of the wireless network. A capture visualization tool can help a network administrator with little knowledge of 802.11 protocols to evaluate the overall health and performance of their wireless network by providing a visual and intuitive representation of the captured data. A spectrum analyzer is a hardware device that measures the radio frequency signals in a given frequency range and displays their amplitude, frequency, and modulation. A spectrum analyzer can help identify sources of interference and noise in the wireless environment, but it cannot open a packet capture file. Python is a programming language that can be used to write scripts or applications that manipulate or analyze packet capture files, but it requires coding skills and knowledge of
802.11 protocols. A WLAN scanner is a software application that scans for available wireless networks and displays information such as SSID, BSSID, channel, signal strength, security type, and vendor. A WLAN scanner can help discover wireless networks and their basic parameters, but it cannot open a packet capture file345 References:
CWAP-404 Study Guide, Chapter 2: Protocol Analysis, page 63
CWAP-404 Objectives, Section 2.5: Use capture visualization tools
CWAP-404 Study Guide, Chapter 4: Spectrum Analysis and Troubleshooting, page 117 CWAP-404 Objectives, Section 4.1: Use spectrum analysis tools CWAP-404 Study Guide, Chapter 2: Protocol Analysis, page 33 CWAP-404 Objectives, Section 2.2: Analyze field values

NEW QUESTION # 127
You are troubleshooting a client that is experiencing slow WLAN performance. As part of the troubleshooting activity, you start a packet capture on your laptop close to the client device. While analyzing the packets, you suspect that you have not captured all packets transmitted by the client. By analyzing the trace file, how can you confirm if you have missing packets?

A. Look for gaps in the sequence number in MAC header
B. Retransmission are an indication of missing packets
C. The missing packets will be shown as CRC errored packets
D. Protocol Analyzers show the number of missing packets in their statistics view

Answer: A

Explanation:
One way to confirm if you have missing packets in your packet capture is to look for gaps in the sequence number in MAC headers. The sequence number is a 12-bit field in the MAC header that is used to identify and order data frames within a traffic stream. The sequence number is incremented by one for each new data frame transmitted by a STA, except for retransmissions, fragments, and control frames. The sequence number can range from 0 to 4095, and then wraps around to 0. If you see a jump or a gap in the sequence number between two consecutive data frames from the same STA, it means that you have missed some packets in between. The other options are not correct, as they do not confirm if you have missing packets in your packet capture. CRC errored packets are packets that have been corrupted during transmission and have failed the error detection check. Protocol analyzers may show the number of CRC errored packets in their statistics view, but not the number of missing packets. Retransmissions are an indication of packet loss or collision, but not necessarily of missing packets in your capture.

NEW QUESTION # 128
......

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Latest CWNP CWAP-404 Free Exam Dumps | Try Free Demo before Purchase

CWNP CWAP-404 Exam Certification Details:

CWAP-404 Latest Exam Online, Exam Dumps CWAP-404 Pdf

CWNP CWAP-404 Exam Topics:

Protocol Analysis - 15%

Spectrum Analysis - 10%

PHY Layers and Technologies - 10%

MAC Sublayer and Functions - 25%

CWNP Certified Wireless Analysis Professional Sample Questions (Q123-Q128):