Valid CWAP-404 Exam Dumps are Your best Choice to Pass

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1. How is the length of an AIFS is calculated?

AIFSN * Slot Time + SIFS

SIFS * Slot Time + AIFSN

DIFS + SIFS + AIFSN

SIFS + AIFS * Time Unit

2. Finish the statement. It is possible to distinguish between _______and ______20 MHz transmissions when looking at an FFT plot.

HR/DSSS and ERP

ERP and VHT

HT and VHT

OFDM and HT

3. 1.Which one of the following should be the first step when troubleshooting a WLAN issue?

Identify capture locations

Identify probable causes

Perform an initial WLAN scan and see if any obvious issues stand out

Define the problem

4. What is the function of the PMD sub-layer?

Converts 1s and 0s given to it by the PLCP sub-layer into the appropriate RF signals

Provides framing

Adds a PHY preamble and header to a PSDU

Performs A-MPDU

5. 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?

The customer should replace all their Bluetooth wireless mice as they are stopping the users on floor 5 from connecting to the wireless network

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

The customers APs are misbehaving and a technical support case should be open with the vendor

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

6. What should the To DS and From DS flags be to set to in an Association Response frame?

To DS = 0, From DS = 0

To DS = 0, From DS = 1

To DS = 1, From DS = 0

To DS = 1, From DS = 1

7. Why would a STA that supports 802.11k Radio Measurement send a Neighbor Request to an AP?

To learn about neighboring interference sources and tune its RF radio accordingly

To inform the current AP about the STA’s intent to roam to a neighboring AP, ensuring a seamless handover

To request a list of neighboring APs which the STA can use as roaming candidates

To request a list of neighboring STAs which enables the STA to better pick the right protection mechanisms

8. What is encrypted within the fourth frame of the 4-Way Handshake?

PMK

PTK

GMK

GTK

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?

Access the microwave remotely and run a diagnostic check

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

Place one of the London APs into spectrum analyzer mode and monitor the situation over lunch time

Ask a local member of staff to change the frequency of the microwave and see if the disconnections stop

10. After examining a Beacon frame decode you see the SSID Element has a length of 0.

What do you conclude about this frame?

The frame is corrupted

This is a common attack on WISP backend SQL databases

The beacon is from a BSS configured to hide the SSID

SSID elements always have a length of 0

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11. How many frames make up the Group Key Handshake excluding any Ack frames that may be required?

12. What is the default 802.11 authentication method for a STA when using Pre-RSNA?

Open System

Shared Key

4-Way Handshake

PSK

13. Protocol analyzers may present field values in either binary, decimal or hexadecimal.

What precedes a

hexadecimal value to indicate it is hexadecimal?

HEX

16x

14. 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?

Capture visualization tool

Protocol analyzer

Spectrum analyzer

WLAN scanner

15. Which one of the these is the most important in the WLAN troubleshooting methodology among those listed?

Interview the network manager about the issues being experienced

Talk to the end users about their experiences

Observe the problem

Obtain detailed knowledge of the wireless vendors debug and logging options

16. 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?

Steering Matrix

Beamforming Matrix

Feedback Matrix

Beamformee Matrix

17. Which one of the following is not an 802.11 Management frame?

Action

Authentication

PS-Poll

Beacon

18. 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?

HT Protection Element

HT Information Element

HT Operation Element

Non-HT Present Element

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