The Avant-garde Guide To CWAP-403 Dumps Questions

NEW QUESTION 1
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 2
How is the length of an AIFS is calculated?

• A. AIFSN * Slot Time + SIFS
• B. SIFS * Slot Time + AIFSN
• C. DIFS + SIFS + AIFSN
• D. SIFS + AIFS * Time Unit

Answer: A

Explanation:
(or length) of an AIFS interval. AIFSN values are set for each access category, giving the AIFS
[AC] a shorter or longer duration, in accordance with the desired priority. This is demonstrated by the AIFS[AC]
formula:
AIFS[AC] = AIFSN[AC] × aSlotTime + aSIFSTime

NEW QUESTION 3
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 4
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 5
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 6
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 7
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 8
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?

• A. The tablets are entering power save mode and failing to wake up to receive the access points transmissions
• B. A high noise floor has resulted in a SNR of less than 20%
• C. The tablets are connecting to the wrong SSID
• D. There is a power mismatch between the APs and the clients

Answer: A

NEW QUESTION 9
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 10
Which one of the following is not an 802.11 Management frame?

• A. Action
• B. Authentication
• C. PS-Poll
• D. Beacon

Answer: C

NEW QUESTION 11
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 12
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 13
When performing protocol analysis, you notice a high number of RTS/CTS frames being transmitted on an HT network. You suspect this may be due to HT protection mechanisms. Where in the Beacon frame would you look to determine which one of the four HT protection modes the AP is operating in?

• A. HT Protection Element
• B. HT Information Element
• C. HT Operation Element
• D. Non-HT Present Element

Answer: A

NEW QUESTION 14
What is the function of the PMD sub-layer?

• A. Converts 1s and 0s given to it by the PLCP sub-layer into the appropriate RF signals
• B. Provides framing
• C. Adds a PHY preamble and header to a PSDU
• D. Performs A-MPDU

Answer: A

NEW QUESTION 15
When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

• A. Frame body excluding the LLC
• B. Frame body including the LLC
• C. Frame body and MAC Header
• D. The whole MPDU

Answer: C

NEW QUESTION 16
As a wireless network consultant you have been called in to troubleshoot a high-priority issue for one of your customers. The customer’s office is based on two floors within a multi-tenant office block. On one of these floors (floor 5) users cannot connect to the wireless network. During their own testing the customer has discovered that users can connect on floor 6 but not when they move to the floor 5. This issue is affecting all users on floor 5 and having a negative effect on productivity.
To troubleshoot this issue, you perform both Spectrum and Protocol Analysis. The Spectrum Analysis shows the presence of Bluetooth signals which you have identified as coming from wireless mice. In the protocol analyzer you see the top frame on the network is Deauthentication frames. On closer investigation you see that the Deauthentication frames’ source addresses match the BSSISs of your customers APs and the destination address is FF:FF:FF:FF:FF:FF:FF.
What do you conclude from this troubleshooting exercise?

• A. The customer should replace all their Bluetooth wireless mice as they are stopping the users on floor 5 from connecting to the wireless network
• B. The users on floor 5 are being subjected to a denial of service attack, as this is happening across the entire floor it is likely to be a misconfigured WIPS solution belonging to the tenants on the floor below
• C. The customers APs are misbehaving and a technical support case should be open with the vendor
• D. The CCI from the APs on the floor 4 is the problem and you need to ask the tenant below to turn down their AP’s Tx power

Answer: A

NEW QUESTION 17
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