The Most Up-to-date Guide To CWAP-403 Practice Exam

NEW QUESTION 1
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 2
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 3
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 4
What is the difference between a Data frame and a QoS-Data frame?

• A. QoS Data frames include a QoS control field
• B. QoS Data frames include a QoS information element
• C. QoS Data frames include a DSCP control field
• D. QoS Data frames include an 802.1Q VLAN tag

Answer: A

NEW QUESTION 5
In the 2.4 GHz band, what data rate are Probe Requests usually sent at from an unassociated STA?

• A. The minimum basic rate
• B. 1 Mbps
• C. 6 Mbps
• D. MCS 0

Answer: B

NEW QUESTION 6
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 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
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 9
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 10
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 11
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 12
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 13
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 14
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 15
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 16
Which one of the following is not a valid reason for an AP to fail a STAs association?

• A. Requesting station has the wrong PSK
• B. Does not support the specified authentication algorithm
• C. AP is unable to handle additional associations
• D. Requesting station does not support all the required data rates

Answer: A

NEW QUESTION 17
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 18
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 19
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 20
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 21
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 22
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 23
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 24
Which one of the following is required for Wi-Fi integration in laptop-based Spectrum Analyzer software?

• A. A supported WLAN adaptor with a customized driver
• B. Any 802.11 wireless adaptor
• C. A dual radio spectrum analyzer card
• D. SNMP read credentials to the WLAN controller or APs

Answer: C

NEW QUESTION 25
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