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[Jul-2024] The Best CWAP Wi-Fi Analysis CWAP-404 Professional Exam Questions

Try 100% Updated CWAP-404 Exam Questions [2024]

CWNP CWAP-404 Exam Certification Details:

Exam Registration PEARSON VUE
Passing Score 70%
Exam Name Wireless Analysis Professional
Exam Price $275 USD
Number of Questions 60
Duration 90 minutes

 

Q89. Where would you look in a packet trace file to identify the configured Minimum Basic Rate (MBR) of a BSS?

 
 
 
 

Q90. In a Spectrum Analyzer the Swept Spectrogram plot displays what information?

 
 
 
 

Q91. Using a portable analyzer you perform a packet capture next to a client STA and you can see that the STA is associated to a BSS. You observe the STA sending packets to the AP and the AP sending packets to the STA. Less the 2% of all packets are retransmissions. You move to capture packets by the AP and, while the retry rate is still very low, you now only see unidirectional traffic from the AP to the client. How do you explain this behavior?

 
 
 
 

Q92. The PLCP sublayer provides framing by adding a header to create what type of data unit?

 
 
 
 

Q93. Finish the statement. It is possible to distinguish between _______and ______20 MHz transmissions when looking at an FFT plot.

 
 
 
 

Q94. What is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY?

 
 
 
 

Q95. Which one of the following is not a valid acknowledgement frame?

 
 
 
 

Q96. What is the function of 802.11 Management frames?

 
 
 
 

Q97. You have installed a new 802.1 lac WLAN configured with 80 MHz channels. Users in one area are complaining about poor performance. This area is currently served by a single AP. You take a spectrum analysis capture in the poor performing area. While examining the waterfall plot you notice the airtime utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel.
What do you conclude?

 
 
 
 

Q98. 802.11k Neighbor Requests and Neighbor Reports are sent in what type of Management Frames?

 
 
 
 

Q99. Given: There are many differences between analyzing wireless and wired networks. In a wireless network, there is no guarantee that one station can hear another station’s transmissions.
If no corrective actions are taken nor corrective mechanisms implemented when a “hidden node” problem exists, which measurable statistics parameter will likely increase in a wireless protocol analyzer?

 
 
 
 
 
 

Q100. You are troubleshooting problems with DHCP in relation to lightweight APs. They vendor class identifier (VCI) is not specified in the DHCP server. When you contact vendor support, they inform you that it is not necessary.
When is this information true?

 
 
 
 

Q101. According to 802.11-2007, in what frame type(s) might you find the PMK Count and PMKID List fields?

 
 
 
 
 

Q102. What is the function of the PHY layer?

 
 
 
 

Q103. As it relates to a spectrum analyzer, complete the following sentence.
The ____________ plot always displays the percentage of time (shown on the Y axis) that the overall RF power is a certain specified threshold (of amplitude) above the noise floor for a given frequency range (shown on the X axis).

 
 
 
 
 

Q104. Given: Your network consists of HT and ERP access points, and you are implementing VoWiFi with support for U-APSD.
When an ERP handset operating in WMM Power Save mode with a ReceiveDTIMs parameter of TRUE receives a Beacon containing a DTIM indicating queued broadcast traffic, what task is the handset required to perform?

 
 
 
 

Q105. A manager at a retail outlet has complained that an incident occurred allowing a STA to launch an attack against another STA connected to their public Wi-Fi hotspot. He has asked you to troubleshoot the situation and verify that all possible measured are being taken to prevent this.
What configuration should you check in the AP?

 
 
 
 

Q106. You require 802.11ac capture solution.
You want to capture using native operating system tools if possible.
What operating system has built-in ability to capture 802.11ac frames assuming it is running on the appropriate laptop hardware?

 
 
 
 

Q107. A new firmware has been released for the AP model you use in your WLAN.
You have more than 120 of these APs installed.
What is a good reason for applying a firmware update on an enterprise AP?

 
 
 
 

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)

 

CWAP-404 Exam Questions Get Updated [2024] with Correct Answers: https://www.braindumpsit.com/CWAP-404_real-exam.html

         

Related Links: myportal.utt.edu.tt myportal.utt.edu.tt www.stes.tyc.edu.tw myportal.utt.edu.tt myportal.utt.edu.tt myportal.utt.edu.tt

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