Question 1

You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?

Options :

A : All clients implement single spatial stream radios

B : The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth

C : The clients are all 802.11n STAs or lower

D : The short guard interval is also enabled.

Answer: C

Question 2

What statement about the IEEE 802.11-2016 QoS facility is true?

Options :

A : 802.11 control frames are assigned to the 802.11 EF priority queue

B : When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.

C : Four 802.1p user priorities are mapped to eight 802.11 transmit queues.

D : 802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.

Answer: D

Question 3

You are evaluating access points for use in the 5 GHZ frequency band. What PHY supports this band and supports 80 MHz channels?

Options :

A : HT

B : VHT

C : OFDM

D : ERP

Answer: B

Question 4

Which unit of measure is used to compare antennas to a dipole antenna?

Options :

A : mDw

B : mW

C : dBi

D : dBd

Answer: D

Question 5

In a long-distance RF link, which statement about Fade Margin is true?

Options :

A : The Fade Margin of a long-distance radio link should be equivalent to the receiver’s low noise filter gain.

B : A Fade Margin is unnecessary on a long-distance RF link if more than 80%

C : Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading

D : The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance

Answer: C

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