CWNP CWAP-403 Questions 2021

NEW QUESTION 1
You are troubleshooting a client that is experiencing slow WLAN performance. As part of the troubleshooting activity, you start a packet capture on your laptop close to the client device. While analyzing the packets, you suspect that you have not captured all packets transmitted by the client. By analyzing the trace file, how can you confirm if you have missing packets?

• A. Look for gaps in the sequence number in MAC header
• B. Protocol Analyzers show the number of missing packets in their statistics view
• C. Retransmission are an indication of missing packets
• D. The missing packets will be shown as CRC errored packets

Answer: C

NEW QUESTION 2
Which one of the following portions of information is communicated in the PHY Header?

• A. Signal strength
• B. Date rate
• C. SNR
• D. Noise

Answer: D

NEW QUESTION 3
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 4
In a Spectrum Analyzer the Swept Spectrogram plot displays what information?

• A. The RF time domain
• B. RF power present at a particular frequency over the course of time
• C. Wi-Fi Device information
• D. Duty cycle in the frequency domain

Answer: D

NEW QUESTION 5
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?

• A. The AP is misconfigured and needs to be reconfigured to 80MHz operation
• B. RRM is enabled and has dynamically picked a 20 MHz channel
• C. The first 20 MHz is the AP’s primary channel and higher airtime utilization on the primary channel is normal when an AP Is configured for 80 MHz operation
• D. Non Wi-Fi interference is preventing the APs 80 MHz operation

Answer: C

NEW QUESTION 6
Which one of the following statements describes the function of WMM Admission Control?

• A. APs guarantee Voice and Video access categories priority over the WLAN medium
• B. APs control access to the wireless medium by polling STAs for data packets
• C. APs regulate the available bandwidth in an attempt to provide a guarantee of the amount of time that a STA has available to access the channel
• D. Provides a new 802.11 Authentication method for Voice devices

Answer: A

NEW QUESTION 7
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 8
How does a VoIP Phone, using WMM Power Save, request data frames buffered at the AP?

• A. The VoIP phone transmits a PS-Poll frame
• B. The VoIP phone transmits a trigger frame
• C. The VoIP phone sets the More Data bit in the MAC Header to 1
• D. The VoIP phone The VoIP transmits a WMM Action frame

Answer: B

NEW QUESTION 9
Given a protocol analyzer can decrypt WPA2-PSK data packets providing the PSK and SSID are configured in the analyzer software.
When performing packet capture (in a non-FT environment) which frames are required in order for PSK frame decryption to be possible?

• A. Authentication
• B. Reassociation
• C. 4-Way Handshake
• D. Probe Response

Answer: C

NEW QUESTION 10
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 11
802.11 k Neighbor Requests and Neighbor Reports are sent in what type of Management Frames?

• A. RRM
• B. Action
• C. Beacon
• D. Reassociation Request and Reassociation Response

Answer: C

NEW QUESTION 12
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 13
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 14
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 15
A PHY Header is added to the PSDU at which sub-layer?

• A. LLC
• B. MAC
• C. PLCP
• D. PMD

Answer: C

Explanation:
The PLCP adds a preamble and PHY header to the PSDU.

NEW QUESTION 16
Why would a STA that supports 802.11k Radio Measurement send a Neighbor Request to an AP?

• A. To learn about neighboring interference sources and tune its RF radio accordingly
• B. To inform the current AP about the STA’s intent to roam to a neighboring AP, ensuring a seamless handover
• C. To request a list of neighboring APs which the STA can use as roaming candidates
• D. To request a list of neighboring STAs which enables the STA to better pick the right protection mechanisms

Answer: C

NEW QUESTION 17
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 18
Where would you look in a packet trace file to identify the configured Minimum Basic Rate (MBR) of a BSS?

• A. Supported Rates & Extended Supported Rates elements in a Beacon frame
• B. In the MBR Action frame
• C. In the Minimum Basic Rate Element in a Beacon frame
• D. In the MBR Information Element in an Association Response frame

Answer: A

NEW QUESTION 19
Which one of the following should be the first step when troubleshooting a WLAN issue?

• A. Identify capture locations
• B. Identify probable causes
• C. Perform an initial WLAN scan and see if any obvious issues stand out
• D. Define the problem

Answer: D

NEW QUESTION 20
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 21
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 22
Which one of the these is the most important in the WLAN troubleshooting methodology among those listed?

• A. Interview the network manager about the issues being experienced
• B. Talk to the end users about their experiences
• C. Observe the problem
• D. Obtain detailed knowledge of the wireless vendors debug and logging options

Answer: C

NEW QUESTION 23
What is encrypted within the fourth frame of the 4-Way Handshake?

• A. PMK
• B. PTK
• C. GMK
• D. GTK

Answer: D

NEW QUESTION 24
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