Free Access Huawei.H12-311_V3.0.v2022-11-21.q106 Practice Test (Page 21)

Question 96

2.4 GHz What is the distance between the center frequencies of the channels in the frequency band ()?

A.22 MHz

B.10 MHz

C.20 MHz

D.5 MHz

Question 97

Radio frequency mainly uses spread spectrum technology. Which of the following technologies belong to spread spectrum technology ()? (Select 2 Answers)

A.OFDM

B.QPSK

C.DSSS

D.FHSS

Question 98

China in 2.4GHz How many channels does the frequency band support ()?

A.11

B.3

C.5

D.13

Question 99

CAPWAP The port number of the control message of the tunnel protocol is ().

A.1645

B.1646

C.5246

D.5247

Question 100

Regarding the two major PoE standards, the following statement is incorrect ().
(Select 2 Answers)

A.802.af, also known as PoE+, can be compatible with 802.a devices

B.802.at, also known as PoE+, can be compatible with 802.a devices

C.The A.802.af standard was formulated in 2009, and the maximum output power is 30W

D.802.at supports four power levels and only supports Category 5 lines

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Question 96

Question 97

Question 98

Question 99

Question 100

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