Question 1

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 2

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 3

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 4

You are installing an AP to be used by 23 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

Options :

A : A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision

B : Channel 1, because it is best to use the channel with the lowest frequency

C : Channel 11, because channels 1 and 6 are in use nearby

D : Channel 6, because it is always best to use this channel

Answer: A

Question 5

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