Free Access CWNP.CWNA-108.v2022-03-22.q78 Practice Test (Page 9)

Question 36

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

A.OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.

B.OFDM modulation is used only in 5 GHz 802.11 transmissions.

C.OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

D.OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.

Question 37

You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

A.Calibrate the floor plan

B.Install iPerf

C.Install WinPCAP

D.Nothing, you can simply start capturing signal readings

Question 38

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

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

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

C.A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

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

Question 39

You are being interviewed by ABC Company for employment as a wireless site survey expert.
The interviewing manager asks you what items should be included in a site survey report generated as part of a manual site survey process.
What answer would be accurate?

A.RF heat map illustrating coverage and signal quality for each frequency band

B.Documentation proving proper entry of wall material types into the site survey software

C.Itemized list of equipment, licenses, and support contracts required for the facility

D.Documentation noting how each WLAN user group will authenticate to the network

Question 40

A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?

A.23 dBm

B.10 dBm

C.13 dBm

D.26 dBm

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Question 36

Question 37

Question 38

Question 39

Question 40

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