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CWNP CWAP-405 Exam Syllabus Topics:

SectionWeightObjectives
Spectrum Analysis Tools and Methodologies15%- 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
- 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
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. Evaluate A-MPDU and A-MSDU frame aggregation structures
  • 2. Deconstruct MAC header fields, duration IDs, and sequence controls
802.11 Operation and Frame Exchanges40%- Control plane handshakes and transmission recovery operations
  • 1. Analyze RTS/CTS protection rules and standard ACK frame transmissions
  • 2. Evaluate Block ACK session initialization and bitmap tracking loops
- 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
- Security framework verification and encryption tracking
  • 1. Deconstruct WPA3, SAE, and 4-way handshake key exchanges
  • 2. Trace 802.1X/EAP authentication phase transitions
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. Configure local and remote frame capture adapters
  • 3. Implement multi-channel packet aggregators
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

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CWNP Certified Wireless Analysis Professional Sample Questions (Q17-Q22):

NEW QUESTION # 17
You have installed a new 802.11ac 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?

Answer: A

Explanation:
In 802.11ac with 80 MHz channels, the AP designates one 20 MHz subchannel as the primary channel. Management traffic and many control-related exchanges occur on the primary channel, and client contention often concentrates there. As a result, it's normal to see higher airtime utilization on the first 20 MHz segment compared to the secondary segments even when the AP is correctly operating at 80 MHz.


NEW QUESTION # 18
When would you expect to see a Reassociation Request frame'

Answer: B

Explanation:
A Reassociation Request frame is sent every time a STA roams from one AP to another within the same ESS.
A Reassociation Request frame is similar to an Association Request frame, but it also contains the BSSID of the current AP that the STA is leaving. This allows the new AP to coordinate with the old AP and transfer the STA's context information, such as security keys, QoS parameters, and buffered frames. This way, the STA can maintain its connectivity and session continuity during roaming . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 195; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 196.


NEW QUESTION # 19
Which one of the following devices typically has a 100% duty cycle?

Answer: A

Explanation:
Analog video cameras transmit a continuous video signal, resulting in a nearly 100% RF duty cycle. Other devices like IoT sensors, Bluetooth mice, or Wi-Fi APs transmit intermittently, so their duty cycles are much lower.


NEW QUESTION # 20
What is the difference between a Data frame and a QoS-Data frame?

Answer: C

Explanation:
The difference between a Data frame and a QoS-Data frame is that QoS Data frames include a QoS control field. A Data frame is a type of data frame that is used to carry user data or upper layer protocol data between STAs and APs. A QoS Data frame is a type of data frame that is used to carry user data or upper layer protocol data between STAs and APs that support QoS (Quality of Service) features. QoS features allow different types of traffic to be prioritized and handled differently according to their QoS requirements, such as delay, jitter, throughput, etc. QoS Data frames include a QoS control field in their MAC header, which contains information such as traffic identifier (TID), queue size (TXOP), acknowledgment policy (ACK), etc., that are used for QoS purposes. The other options are not correct, as they do not describe the difference between Data and QoS Data frames. QoS Data frames do not include a DSCP (Differentiated Services Code Point) control field, which is part of the IP header in the network layer, not the MAC header in the data link layer. QoS Data frames do not include a QoS information element (IE), which is part of some management frames that indicate QoS capabilities or parameters, not data frames. QoS Data frames do not include an 802.1 Q VLAN tag, which is part of some Ethernet frames that indicate VLAN membership or priority, not wireless frames. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 5: 802.11 MAC Sublayer, page 118-119


NEW QUESTION # 21
Which is not a valid interpretation for one of the 4 address fields in the MAC header?

Answer: D

Explanation:
The 802.11 MAC header can contain up to four addresses: source address (SA), transmitter address (TA), receiver address (RA), and destination address (DA). "Sender address" is not a defined field in the standard, making it invalid.


NEW QUESTION # 22
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