Question 1

After examining a Beacon frame decode you see the SSID Element has a length of 0. What do you conclude about this frame?

Options :

A : The frame is corrupted

B : SSID elements always have a length of 0

C : This is a common attack on WISP backend SQL databases

D : The beacon is from a BSS configured to hide the SSID

Answer: D

Question 2

After examining a Beacon frame decode you see the SSID Element has a length of 0. What do you conclude about this frame?

Options :

A : The frame is corrupted

B : SSID elements always have a length of 0

C : This is a common attack on WISP backend SQL databases

D : The beacon is from a BSS configured to hide the SSID

Answer: D

Question 3

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?

Options :

A : The tablets are connecting to the wrong SSID

B : The tablets are entering power save mode and failing to wake up to receive the access points transmissions

C : A high noise floor has resulted in a SNR of less than 20dB

D : There is a power mismatch between the APs and the clients

Answer: D

Question 4

You are explaining capacity planning to another engineer assisting you on a WLAN implementation project. As part of the explanation, you provide the following formula: C = B * log2(1 + S/N). What does this formula define?

Options :

A : Bandwidth capabilities of a channel

B : The WEP encryption algorithm

C : Minimum signal strength for a data rate

D : Maximum signal strength of a channel

Answer: A

Question 5

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?

Options :

A : Look at Retry counts

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

C : Look for frames with a low signal strength value in the radio tap header

D : Look at CRC errors

Answer: B

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