Question 1

Finish the statement: It is possible to distinguish between_______22 MHz transmissions and________20 MHz transmissions when looking at an FFT plot.

Options :

A : HR/DSSS and ERP

B : OFDM and HT

C : ERP and VHT

D : HT and VHT

Answer: B

Question 2

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

Question 3

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

Options :

A : QoS Data frames include a DSCP control field

B : QoS Data frames include a QoS information element

C : QoS Data frames include an 802.1Q VLAN tag

D : QoS Data frames include a QoS control field

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

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