Free Access Huawei.H12-311-ENU.v2022-04-22.q123 Practice Test (Page 24)

In an 802.11 frame, the terminal needs to obtain access rights to the wireless medium. Which control message need to be sent?

A.ACK

B.CTS

C.RTS

D.PS-Poll

The equipment manufacturer can usually be judged according to the following.

A.MAC address

B.Encryption type

C.Channel

D.SSID

How much Mbps is the maximum rate supported by the original 802.11 protocol?

A.2

B.11

C.1

D.5.5

Which modulation method does the following picture belong to?

A.frequency modulation

B.modulation

C.amplitude modulation

D.phase modulation

For the antenna lobe width, which of the following description is correct? (Multiple choice)

A.The terminal can receive the signal only within the half power angle coverage.

B.The pattern usually has two or more petals

C.In the main lobe range, the power density decreases by half (3dB) relative to the maximum radiation direction.

D.The narrower the lobes, the better the directionality, the farther the radiation distance, the stronger the anti-interference ability

Other Version: 5083Huawei.H12-311-ENU.v2022-06-28.q206; 49Huawei.Prepawaypdf.H12-311-ENU.v2021-10-12.by.dempsey.115q.pdf

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