CWAP-405 PDF問題サンプル & CWAP-405資料勉強

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CWNP CWAP-405 Exam Syllabus Topics:

SectionWeightObjectives
802.11 Frame Formats and Technologies20%- MAC sublayer encapsulation and frame structural components
  • 1. Deconstruct MAC header fields, duration IDs, and sequence controls
  • 2. Evaluate A-MPDU and A-MSDU frame aggregation structures
- Physical Layer (PHY) header mechanics and encoding structures
  • 1. Decode training fields, signal fields, and preamble formats
  • 2. Analyze PHY metrics including HE, EHT, and VHT configuration nodes
WLAN Medium Access10%- Contention algorithms and wireless scheduling parameters
  • 1. Analyze DCF mechanics, carrier sensing, and backoff timers
  • 2. Evaluate EDCA parameters, access categories, and TXOP duration limits
Spectrum Analysis Tools and Methodologies15%- Spectrum analyzer configuration parameters and visualization layouts
  • 1. Interpret real-time FFT graphs, waterfall logs, and persistence charts
  • 2. Configure sweeping rules, RBW controls, and span baselines
- Non-802.11 interference isolation and signature tracking
  • 1. Analyze duty cycle measurements to evaluate active airtime constraints
  • 2. Identify signatures of Bluetooth, microwave ovens, and analog video systems
802.11 Operation and Frame Exchanges40%- Management sublayer protocols and connectivity lifecycles
  • 1. Trace authentication, association, and multi-tier roaming handshakes
  • 2. Evaluate 802.11 power save operational states and timeline markers
  • 3. Analyze beaconing, multi-BSSID profiles, and probe exchange sequences
- Control plane handshakes and transmission recovery operations
  • 1. Evaluate Block ACK session initialization and bitmap tracking loops
  • 2. Analyze RTS/CTS protection rules and standard ACK frame transmissions
- Security framework verification and encryption tracking
  • 1. Trace 802.1X/EAP authentication phase transitions
  • 2. Deconstruct WPA3, SAE, and 4-way handshake key exchanges
Protocol Analysis Tools and Methodologies15%- Troubleshooting methodologies and capture safety
  • 1. Apply disciplined network diagnostic isolation lifecycles
  • 2. Isolate protocol analyzer drop counts during heavy file transfers
- WLAN analyzer architectures and placement configurations
  • 1. Analyze hardware timestamp methods to minimize processing delays
  • 2. Implement multi-channel packet aggregators
  • 3. Configure local and remote frame capture adapters

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CWNP Certified Wireless Analysis Professional 認定 CWAP-405 試験問題 (Q125-Q130):

質問 # 125
Which common feature of a Spectrum Analyzer would be the best to help you locate a non-
802.11 interference source?

正解：C

解説：
A device finder feature helps physically locate the source of non-802.11 interference by providing a directional or proximity-based indication of signal strength. As you move through the environment, the tool guides you toward the strongest RF energy source, making it the most effective feature for tracking down an interfering device.


質問 # 126
Which one of the following is not a valid acknowledgement frame?

正解：B

解説：
RTS is not a valid acknowledgement frame. RTS stands for Request To Send, and it is a control frame that is used to initiate an RTS/CTS exchange before sending a data frame. The purpose of an RTS/CTS exchange is to reserve the medium for a data transmission and avoid collisions with hidden nodes. An acknowledgement frame is a control frame that is used to confirm the successful reception of a data frame or a block of data frames. The valid acknowledgement frames are CTS (Clear To Send), Ack (Acknowledgement), and Block Ack (Block Acknowledgement) . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 186; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 187; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 189; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 190.


質問 # 127
You are troubleshooting an 802.1X\EAP exchange and see the AP sends an initial EAP Request for Identity, the client responds with an EAP response frame containing an identity. Though the AP acknowledges receipt of the EAP response no more EAP messages are transmitted. What should be the next steps in the 802.1X\EAP Authentication?

正解：D

解説：
In 802.1X, after receiving the EAP Response/Identity from the client, the AP (authenticator) forwards it to the RADIUS (authentication) server. The RADIUS server then continues the EAP authentication by sending EAP Request messages back to the supplicant via the AP, completing the authentication process.


質問 # 128
When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

正解：B

解説：
With WPA2 encryption, the protected portion of the frame is the frame body, which includes the LLC PDU. The MAC header remains unencrypted so that intermediate devices and receivers can process addressing and control information, while the payload (including the LLC header and upper-layer data) is encrypted to ensure confidentiality.


質問 # 129
A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources. From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?

正解：C

解説：
Spectrum analysis can reveal elevated RF energy across the band even when no distinct interference signatures are present. A persistently high noise floor reduces the signal-to-noise ratio, and if the SNR drops below a usable threshold, clients may fail to reliably detect and decode frames needed to connect and maintain service, despite a survey showing adequate coverage levels.


質問 # 130
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