CWNP CWAP-403 Free Practice Questions

NEW QUESTION 1
What is an AIFS?

• A. A form of aggregation performed at the PLCP sub-layer
• B. The shortest period of time a STA can sleep
• C. A medium access method introduced by 802.11n, but never implemented
• D. A variable Interframe Space introduced by 802.11e to help prioritize medium access for different AccessCategories

Answer: D

NEW QUESTION 2
What is encrypted within the fourth frame of the 4-Way Handshake?

• A. PMK
• B. PTK
• C. GMK
• D. GTK

Answer: D

NEW QUESTION 3
Prior to a retransmission what happens to the CWmax value?

• A. Reset to 0
• B. Doubles and increases by 1
• C. Increases by 1
• D. Set to the value of the AIFSN

Answer: B

NEW QUESTION 4
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 5
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 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
Which common feature of a Spectrum Analyzer would be the best to help you locate a non-802.11 interference source?

• A. Max hold
• B. Location filter
• C. Waterfall plot
• D. Device finder

Answer: D

NEW QUESTION 8
You are performing a multiple adapter channel aggregation capture to troubleshoot a VoIP roaming problem and would like to measure the roaming time from the last VoIP packet sent on the old AP’s channel to the first VoIP packet sent on the new AP’s channel. Which timing column in the packet view would measure this for you?

• A. Delta
• B. Absolute
• C. Roaming
• D. Relative

Answer: C

NEW QUESTION 9
The network administrator at ABC Engineering has taken a large packet capture from one of their APs running in monitor mode. She has very little knowledge of 802.11 protocols but would like to use the capture file to evaluate the overall health and performance of their wireless network. When she asks your advice, which tool do you recommend she opens the packet capture file with?

• A. Capture visualization tool
• B. Protocol analyzer
• C. Spectrum analyzer
• D. WLAN scanner

Answer: B

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 best following is an advantage of using display filters instead of capture-time filters?

• A. Display filters allow for focused analysis on just the packets of interest
• B. Once created display filters are reusable for later captures
• C. Display filters only hide the packets from view and the filtered packets can be enabled for view later
• D. Multiple display filters can be applied simultaneously

Answer: A

Explanation:
display filters allow you to focus on things of interest and to ignore things you don't care about.

NEW QUESTION 12
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 13
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 14
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 15
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 16
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 17
After examining a Beacon frame decode you see the SSID Element has a length of 0. What do you conclude about this frame?

• A. The frame is corrupted
• B. This is a common attack on WISP backend SQL databases
• C. The beacon is from a BSS configured to hide the SSID
• D. SSID elements always have a length of 0

Answer: C

NEW QUESTION 18
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 19
You are analyzing a packet decode of a Probe Request and notice the SSID element has a length of zero. What do you conclude about transmitting STA?

• A. The WLAN adaptor is configured in promiscuous mode
• B. The STA is operating in Ad-Hoc mode
• C. The STA’s WLAN adaptor is disabled
• D. The STA is discovering a list of available BSSs

Answer: B

NEW QUESTION 20
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 21
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 22
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 23
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 24
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 25
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 26
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