CWAP-403 Exam - Certified Wireless Analysis Professional

NEW QUESTION 1
What should the To DS and From DS flags be to set to in an Association Response frame?

• A. To DS = 0, From DS = 0
• B. To DS = 0, From DS = 1
• C. To DS = 1, From DS = 0
• D. To DS = 1, From DS = 1

Answer: A

NEW QUESTION 2
How many frames make up the Group Key Handshake excluding any Ack frames that may be required?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: D

NEW QUESTION 3
Finish the statement. It is possible to distinguish between _____ and _______ 20 MHz transmissions when looking at an FFT plot.

• A. HR/DSSS and ERP
• B. ERP and VHT
• C. HT and VHT
• D. OFDM and HT

Answer: C

NEW QUESTION 4
During a VHT Transmit Beamforming sounding exchange, the beamformee transmits a Compressed Beamforming frame to the beamformer. What is communicated within this Compressed Beamforming frame?

• A. Steering Matrix
• B. Beamforming Matrix
• C. Feedback Matrix
• D. Beamformee Matrix

Answer: C

NEW QUESTION 5
What is the formula used to calculate the Duration field value in an RTS frame?

• A. RTS Duration field = CTS duration
• B. RTS Duration field = Data or management to be sent frame duration
• C. RTS Duration field = Data or management frame to be sent duration + CTS duration + one ACK duration + three SIFS
• D. RTS Duration field = Data or management frame to be sent duration + CTS duration

Answer: C

NEW QUESTION 6
What is the function of the PHY Preamble?

• A. To set the modulation method for the MPDU
• B. Allows the receiver to detect and synchronize with the signal
• C. To terminate a conversation between transmitter and receiver
• D. Carries the NDP used in Transmit Beamforming and MU-MIMO

Answer: B

NEW QUESTION 7
Where, in a protocol analyzer, would you find an indication that a frame was transmitted as part of an AMPDU?

• A. The HT Operation Element
• B. A-MPDU flag in the HT Control Field
• C. A-MPDU flag in the Frame Control Field
• D. The Aggregation flag in the Radio Tap Header

Answer: B

NEW QUESTION 8
Which one of the following is not a valid acknowledgment frame?

• A. RTS
• B. CTS
• C. Ack
• D. Block Ack

Answer: C

NEW QUESTION 9
ABC International has installed a new smart ZigBee controlled lighting system. However, the network team is concerned that this new system will interface with the existing WLAN and has asked you to investigate the impact of the two systems operating simultaneously in the 2.4 GHz band. When performing Spectrum Analysis, which question could you answer by looking at the FFT plot?

• A. Do the ZigBee channels used by the lightning system overlap with the WLAN channels?
• B. Is the ZigBee system using more the 50% of the available airtime?
• C. Is the ZigBee system causing an increase in WLAN retries?
• D. Is the WLAN corrupting ZigBee system messages?

Answer: C

NEW QUESTION 10
A client is operating in an unstable RF environment. Out of five data frames transmitted to the client it only receives four. The client sends a Block Ack to acknowledge the receipt of these four frames but due to frame corruption the Block Ack is not received by the AP. Which frames will be transmitted?

• A. Only the data frame which was corrupted
• B. Both the corrupted data and Block Ack
• C. All data frames
• D. Only the Block Ack

Answer: D

NEW QUESTION 11
Protocol analyzers may present field values in either binary, decimal or hexadecimal. What precedes a hexadecimal value to indicate it is hexadecimal?

• A. 0x
• B. %
• C. HEX
• D. 16x

Answer: A

NEW QUESTION 12
What does the value of the Listen Interval field in an Association request frame indicate?

• A. How long a STA performing active scanning will listen for Probe Responses before changing channels
• B. How often a STA will go off channel to look for other BSSs
• C. How often a STA in power save mode wakes up to listen to Beacon frames
• D. How long a STA waits for an Ack before retransmitting the frame

Answer: C

Explanation:
how often a STA in power save mode wakes to listen to Beacon management frames.

NEW QUESTION 13
Which one of the following statements is not true concerning DTIMs?

• A. Buffered Broadcast and Multicast traffic will be transmitted following a DTIM
• B. The DTIM interval can dictate when an STA will wake up to listen to beacon frames
• C. DTIM stands for Delivery Traffic Indication Map
• D. Every Beacon frame must contain a DTIM

Answer: B

NEW QUESTION 14
What is the function of 802.11 Management frames?

• A. Manage the BSS
• B. Manage the flow of data
• C. Communicate configuration changes between WLAN controller and APs
• D. Prioritize network administration traffic

Answer: C

NEW QUESTION 15
When would you expect to see a Reassociation Request frame?

• A. Every time a STA associates to an AP to which it has previously been associated
• B. Only when a STA is using FT roaming
• C. Only when a STA roams back to an AP it has previously been associated with
• D. Every time a STA roams

Answer: D

NEW QUESTION 16
You’re the WLAN administrator for a large retailer based at the HQ in New York. The London-based office has been complaining about WLAN disconnections around lunch time each day. You suspect this might be interference from the staff microwave, how might you test your theory from the New York office?

• A. Access the microwave remotely and run a diagnostic check
• B. Ask a local member of staff to take some pictures of the microwave, including some close-ups of the door seal so that you can access it
• C. Place one of the London APs into spectrum analyzer mode and monitor the situation over lunch time
• D. Ask a local member of staff to change the frequency of the microwave and see if the disconnections stop

Answer: A

NEW QUESTION 17
Given: The Frame Check Sequence (FCS) is a 32 CRC used for error detection. The CRC is calculated over what?

• A. Frame Body only
• B. Mac Header and Frame Body only
• C. PHY Header, MAC Header and Frame Body
• D. PHY Header and MAC Header only

Answer: B

NEW QUESTION 18
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?

• A. There is a transmit power mismatch between the client and the AP and while the client can hear the Aps traffic, the AP cannot hear the client.
• B. The portable analyzer has a lower receive sensitivity than the AP and while it can’t capture the packets from the client STA, the AP can receive them OK.
• C. The STA is transmitting data using more spatial streams than the potable analyzer can support
• D. The portable analyzer is too close to the AP causing CCI, blinding the AP to the client’s packets

Answer: B

NEW QUESTION 19
What is the default 802.11 authentication method for a STA when using Pre-RSNA?

• A. Open System
• B. Shared Key
• C. 4-Way Handshake
• D. PSK

Answer: A

NEW QUESTION 20
When configuring a long term, forensic packet capture and saving all packets to disk which of the following is not a consideration?

• A. Total capture storage space
• B. Individual trace file size
• C. Real-time packet decodes
• D. Analyzer location

Answer: B

NEW QUESTION 21
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