Question 1

Which statement correctly describes an ad hoc wireless network?

Options :

A : It is referred to as an IBSS.

B : It has a maximum connectivity range of 1000 meters.

C : It requires an AP.

D : It uses multiple wireless frequencies.

Answer: A

Question 2

Which two statements about line-of-sight communication are true? (Choose two.)

Options :

A : A signal might reflect on an object and be successfully received in a place from which the sender cannot be seen

B : For a 6-foot person, the horizon appears at about 6 miles.

C : Visual obstacles always prevent adequate line of sight.

D : Visual line of sight is necessary for good signal transmission.

E : The distance between the sender and receiver must be at least 25 miles apart for earth curvature to play a role in the quality of outdoor links

Answer: A,B

Question 3

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 4

You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems. Based on this information, what is the likely cause of the problem?

Options :

A : The AP is overloaded during the work day

B : The laptop has a failing wireless adapter

C : The external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use

D : The drives in the laptop are corrupt

Answer: C

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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