Free Access Huawei.H12-311_V3.0.v2022-08-16.q106 Practice Test (Page 7)

Question 26

For the polarization of electromagnetic waves, which of the following descriptions is correct is (). (Select 3 Answers)

A.If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and the polarization direction of the two must be the same.

B.If the electric field direction of the electric wave is perpendicular to the ground, we call it a vertically polarized wave

C.The polarization of the antenna refers to the direction of the magnetic field strength formed when the antenna radiates
, The direction of the electric field changes according to a certain rule

D.The antenna radiates electromagnetic waves to the surrounding space

Question 27

Not loaded license Time AC6605 Supported by default AP The number is ().

A.10

B.8

C.4

D.0

Question 28

The following description of the classification and functions of Huawei APs, the correct statement is ().
(Select 3 Answers)

A.AP6310SN is an indoor distributed AP

B.AP6610DN is a gigabit fiber interface, so it cannot be directly connected to AC6605

C.AP6510DN and AP6610DN are both outdoor APs

D.AP6010SN and AP6010DN are indoor APs

Question 29

The following statement is correct ().
(Select 3 Answers)

A.WPA2 uses 802.1X authentication

B.WPA2 PSK authentication requires the user to enter a user name and password to connect

C.When the user performs web authentication, it is triggered by the user's http message after successfully obtaining the IP address; at this time, it is forcibly redirected to the portal server, Go through the certification process

D.WAPI is China's national standard system for wireless LAN

Question 30

In China, legally supported WLAN The frequency band has ().
(Select 2 Answers)

A.5.15-5.25GHz

B.2.4-2.4835GHz

C.5.725-5.850GHz

D.5.25-5.35GHz

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