최신 CWNA-108 무료덤프 - CWNP Certified Wireless Network Administrator

문제1

What can cause excessive VSWR in RF cables used to connect a radio to an antenna?

A. High gain yagi antenna

B. High gain parabolic dish antenna

C. Radio output power above 100 mW but below 400 mw

D. Impedance mismatch

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제2

What statement about the beamwidth of an RF antenna is true?

A. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.

B. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.

C. Horizontal and vertical beamwidth are calculated at the points where the main lobe decreases power by
3 dB.

D. Vertical beamwidth is displayed (in degrees) on the antenna's Azimuth chart.

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제3

You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?

A. Waterfall/Spectrogram

B. Clients

C. Real-time FFT

D. APs

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제4

What statement about 802.11 WLAN bridges is true?

A. WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

B. WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

C. WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

D. WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제5

An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain. What is the power level at the Intentional Radiator?

A. 25 mW

B. 250 mW

C. 500 mW

D. 1000 mW

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제6

You are reporting on the RF environment in your facility. The manager asks you to describe the noise floor noted in the report. Which of the following is the best explanation?

A. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.

B. The noise caused by elevators, microwave ovens, and video transmitters.

C. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

D. The extra energy radiated by access points and client devices beyond that intended for the signal.

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제7

When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

A. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.

B. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.

C. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.

D. Legacy Power Save mode was removed in the 802.11ac amendment.

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제8

You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your
2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIds, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

A. DoS attack

B. Interference from non-Wi-Fi sources

C. Faulty drivers

D. Interference from other WLANs

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제9

As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What describes the rate at which this expansion happens?

A. Inverse square law

B. Ohm's law

C. MU-MIMO

D. Fresnel zone thinning

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제10

An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?

A. Refraction

B. Reflection

C. Warping

D. Scattering

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

최신 CWNA-108 무료덤프 - CWNP Certified Wireless Network Administrator

우리와 연락하기

유용한 링크

최신 업데이트