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CWNP CWAP-405 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: 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
Topic 2: Spectrum Analysis Tools and Methodologies15%- Non-802.11 interference isolation and signature tracking
  • 1. Identify signatures of Bluetooth, microwave ovens, and analog video systems
  • 2. Analyze duty cycle measurements to evaluate active airtime constraints
- Spectrum analyzer configuration parameters and visualization layouts
  • 1. Configure sweeping rules, RBW controls, and span baselines
  • 2. Interpret real-time FFT graphs, waterfall logs, and persistence charts
Topic 3: 802.11 Frame Formats and Technologies20%- 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
- 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
Topic 4: 802.11 Operation and Frame Exchanges40%- 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
- Management sublayer protocols and connectivity lifecycles
  • 1. Analyze beaconing, multi-BSSID profiles, and probe exchange sequences
  • 2. Trace authentication, association, and multi-tier roaming handshakes
  • 3. Evaluate 802.11 power save operational states and timeline markers
Topic 5: Protocol Analysis Tools and Methodologies15%- WLAN analyzer architectures and placement configurations
  • 1. Configure local and remote frame capture adapters
  • 2. Implement multi-channel packet aggregators
  • 3. Analyze hardware timestamp methods to minimize processing delays
- Troubleshooting methodologies and capture safety
  • 1. Apply disciplined network diagnostic isolation lifecycles
  • 2. Isolate protocol analyzer drop counts during heavy file transfers

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CWNP Certified Wireless Analysis Professional Sample Questions (Q32-Q37):

NEW QUESTION # 32
Which one of the statements regarding the Frame Control field in an 802.11 MAC header is true?

Answer: A

Explanation:
The statement that the Frame Control field contains subfields, and some 1-bit flags is true. The Frame Control field is a 2-byte field in the MAC header that contains information about the type, subtype, and characteristics of a frame. The Frame Control field is divided into several subfields, each with a specific function and length.
Some of these subfields are 1-bit flags, which can be set to 0 or 1 to indicate a certain condition or status. For example, the To DS and From DS subfields are 1-bit flags that indicate whether a frame is destined for or originated from the DS (Distribution System). The other statements are not true, as they do not describe the Frame Control field correctly. All types of frames (management, control, and data) have a Frame Control field, not just control frames. The Frame Control field is not used to communicate the duration value, which is a separate field in the MAC header. The Frame Control field is not always set to 0, as it varies depending on the type, subtype, and characteristics of each frame. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 5: 802.11 MAC Sublayer, page 113-114


NEW QUESTION # 33
What is the function of the PHY layer?

Answer: B

Explanation:
The function of the PHY layer is to convert PSDUs to PPDUs for transmissions and PPDUs to PSDUs for receptions. A PSDU (PHY Service Data Unit) is the data unit that is passed from the MAC layer to the PHY layer for transmission, or from the PHY layer to the MAC layer for reception. A PPDU (PHY Protocol Data Unit) is the data unit that is transmitted or received over the wireless medium by the PHY layer. A PPDU consists of a PSDU and a PHY header, which contains information such as modulation, coding, and data rate.
The PHY layer adds or removes the PHY header to or from the PSDU during the conversion process. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 4: 802.11 Physical Layer, page 97-98


NEW QUESTION # 34
In the 2.4 GHZ band, what data rate are Probe Requests usually sent at from an unassociated STA?

Answer: C

Explanation:
In the 2.4 GHz band, probe requests are usually sent at the minimum basic rate from an unassociated STA. A probe request is a type of management frame that is transmitted by a STA to discover available BSSs in its vicinity. A probe request can be sent on one or more channels in either passive or active scanning mode. In passive scanning mode, a STA listens for beacon frames from APs on each channel. In active scanning mode, a STA sends probe requests on each channel and waits for probe responses from APs. A probe request is usually sent at the minimum basic rate, which is the lowest data rate among the supported rates that is required for all STAs to join and communicate with a BSS. The minimum basic rate can vary depending on the configuration of each BSS, but it is typically one of these values: 1 Mbps, 2 Mbps, 5.5 Mbps, or 11 Mbps in the 2.4 GHz band. The other options are not correct, as they do not reflect how probe requests are usually sent in the 2.4 GHz band. MCS 0 is a modulation and coding scheme used by 802.11n/ac devices in either band, but it is not a data rate per se. 6 Mbps is a data rate used by OFDM devices in either band, but it is not usually configured as a minimum basic rate in the 2.4 GHz band. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 5: 802.11 MAC Sublayer, page 123-124


NEW QUESTION # 35
You have deployed a new 802.11ac WLAN for a customer who wants to take advantage of
802.11ac standardized Transmit Beamforming. After the installation you perform a protocol capture to confirm Transmit Beamforming is operating as expected. When analyzing the protocol exchange you observe the beamformer transmits a VHT NDP Announcement frame but you never see the transmitted NDP. What do you conclude from this behavior?

Answer: D

Explanation:
Null Data Packets (NDPs) used in 802.11ac beamforming are PHY-layer constructs without MAC frames. Since protocol analyzers capture at the MAC layer, NDPs do not appear in the capture even though they are transmitted, which is why only the VHT NDP Announcement is visible.


NEW QUESTION # 36
What action is taken automatically by 802.11 APs and client STAs as the signal strength of the link weakens in order to improve the quality of the RF communications overall?

Answer: A


NEW QUESTION # 37
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