Question 1

What action is taken automatically by 802.11 APs and client STAs as the signal strength of the link weakens in order to improve the quality of the RF communications overall?

Options :

A : Output power is increased

B : RSSI is increased

C : Data rates are reduced

D : Antenna gain is increased

Answer: C

Question 2

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 3

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 4

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 5

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

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