For the lobe width, which of the following descriptions is correct is (). (Select 3 Answers)

• A.Within the range of the main lobe, the power density relative to the maximum radiation direction is reduced by half (3dB) Angle
• B.The pattern usually has two or more lobes
• C.The narrower the lobe width, the better the directivity, the longer the radiation distance, the stronger the anti-interference ability
• D.Only within the coverage of the half power angle, the terminal can receive the signal

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Which of the following descriptions of business VLAN is correct is ().
(Select 3 Answers)

• A.Service VLAN under the service set template
• B.If the data tunnel is used for forwarding, user data will not be transmitted through the business VLAN business
• C.Mainly responsible for transmitting data when WLAN users go online
• D.PVID VLAN under the WLAN ESS interface

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2.4 GHz What is the frequency band US non-overlapping channel ()?

• A.3,7,13
• B.1,6,11
• C.3,8,13
• D.2,7,12

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2.4 GHz What is the range of operating frequency specified by China ()?

• A.2.4465 GHz-2.4835 GHz
• B.2.471 GHz-2.497 GHz
• C.2.4 GHz-2.4835 GHz
• D.2.445 GHz-2.475 GHz

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Which of the following is correct about the power calculation ()?
(Select 3 Answers)

• A.10 dBm = 100mW
• B.0 dBm = 1 mW
• C.3 dBm = 2 mW
• D.27 dBm = 500mW

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