Compared with 802.11a/b/g, the technical advantages of 802.11n include which of the following aspects ()?

• A.The other three items are correct
• B.Support MIMO technology
• C.The maximum theoretical transmission rate is increased to 600Mbps
• D.Backward compatible with 802.11a/b/g protocol

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Which of the following protocols support 2.4GHz Frequency band()? (Select 3 Answers)

• A.802.11g
• B.802.11b
• C.802.11a
• D.802.11n

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When coverage area 2.4GHz Frequency band 1 When channel interference is large and severe, adjust the device to 3 Channel, can effectively reduce interference.

• A.True
• B.False

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CAPWAP Tunnel encapsulation AC The port number of the side data packet is5246 , The control message port number is5247 .

• A.True
• B.False

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AP Transmit power 20dBm , Antenna gain 4dBi , Cable and device loss 1dB , Terminal receiving antenna gain 2dBi , Space propagation loss 80dB , Terminal receiving level RSSI= ().

• A.-54
• B.-55
• C.-56
• D.-57

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