Certified Wireless Analysis Professional (CWAP-404) Free Practice Test

Question 1

Given: Adjacent Channel Interference (ACI) can cause frame corruption and poor performance in WLANs. You are using a protocol analyzer in the attempt to detect ACI.
What should you look for in such a scenario?

A. Capture on the channel you think may be impacted by ACI and see if any frames are captured from adjacent channels

B. Look at Retry counts

C. Look at CRC errors

D. Look for frames with a low signal strength value in the radio tap header

Correct Answer: A

Question 2

What is the difference between a Data frame and a QoS-Data frame?

A. QoS Data frames include an 802.1Q VLAN tag

B. QoS Data frames include a QoS control field

C. QoS Data frames include a DSCP control field

D. QoS Data frames include a QoS information element

Correct Answer: B

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 3

Which parameters accurately describe the Beacon Interval field in the Beacon frame? (Choose 2)

A. Indicates the desired time interval between TBTTs

B. Measured in time units of 1024 ms

C. Value can range from 0 to 2007

D. Indicates the exact time interval between Beacon transmissions

E. 4-octet length

Correct Answer: A,B

Question 4

An HT STA does not receive an ACK for a first-attempt data frame that it transmitted. Assuming this STA is not using BlockAcks in this case, what happens to the HT STA's EDCA contention window?

A. The slot time within the contention window decreases by 50%.

B. The contention window is immediately closed, and the frame is retransmitted.

C. The contention window is not affected by failed Data frame delivery.

D. It varies because the backoff algorithm is random.

E. The contention window approximately doubles in size.

Correct Answer: E

Question 5

Which one of the following is not a valid reason for an AP to fail a STAs association?

A. AP is unable to handle additional associations

B. Requesting station does not support all the required data rates

C. Does not support the specified authentication algorithm

D. Requesting station has the wrong PSK

Correct Answer: D

Question 6

When using a commercial WLAN protocol analyzer, you notice that it is listing vendor names for some APs and client STAs.
What is the source of this information?

A. Banner grabbing

B. DNS name resolution

C. Vendor OUI values

D. Broadcast name resolution

Correct Answer: C

Question 7

Protocol analyzers may present field values in either binary, decimal or hexadecimal. What precedes a hexadecimal value to indicate it is hexadecimal?

A. %

B. 0x

C. HEX

D. 16x

Correct Answer: B

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 8

When 802.11 standard compliant AES-CCMP security is being used with IPSec/ESP for layered security, what will a WLAN protocol analyzer see as the security mechanism in use when a user browses to an HTTPS secured web page?

A. AES-CCMP

B. SSLv3

C. IPSec/ESP

D. AES-CCMP, IPSec/ESP, AND SSLv3

E. AES-CCMP and IPSec/ESP

Correct Answer: A

Question 9

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

A. 6 Mbps

B. MCS 0

C. 1 Mbps

D. The minimum basic rate

Correct Answer: D

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 10

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 long a STA waits for an Ack before retransmitting the frame

D. How often a STA in power save mode wakes up to listen to Beacon frames

Correct Answer: D

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 11

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 frame to be sent duration + CTS duration + one ACK duration + three SIFS

C. RTS Duration field = Data or management frame to be sent duration + CTS duration

D. RTS Duration field = Data or management to be sent frame duration

Correct Answer: B

Question 12

Several users have reported WLAN network connection issues and the users connect to the same AP. These users are spread throughout a 320 square meter area. Using a spectrum analyzer, you see RF energy across the entire 2.4 GHz band at significant signal strength levels.
The users all connect using either HT or ERP devices.
What is the likely cause of this problem within this area?

A. Microwave oven

B. Video camera

C. Bluetooth devices

D. Wide-band jammer

Correct Answer: D

Question 13

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. Roaming

B. Relative

C. Delta

D. Absolute

Correct Answer: A

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Question 14

With what access category's parameters are WLAN multicast video frames transmitted when the EDCAF is in use by the transmitting station?

A. AC_VO

B. AC_BE

C. AC_BK

D. AC_VI

Correct Answer: A

Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).

Welcome to TestSimulate

CWNP Certified Wireless Analysis Professional (CWAP-404) Free Practice Test