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

• A.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
• B.WPA2 uses 802.1X authentication
• C.WPA2 PSK authentication requires the user to enter a user name and password to connect
• D.WAPI is China's national standard system for wireless LAN

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802.11b Which channels in the protocol do not overlap each other()? (Select 3 Answers)

• A.3
• B.6
• C.11
• D.1

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In the WDS point-to-point network, the backbone link between Root AP and Leaf AP is connected in the 5GHz frequency band. The frequency band is 149. Which of the following frequency bands () should Leaf AP use?

• A.157
• B.153
• C.Apart from 149 It will be all right
• D.149

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for CAPWAP Agreement, the error described below is ().

• A.Depend on CAPWAP Working group development CAPWAP
• B.thin AP Transmission protocol with wireless client
• C.AC And thin AP Transfer protocol
• D.The formulation of the agreement has absorbed the useful features of other agreements

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Which of the following options is the frequency range supported by China 5GHz Frequency band()?

• A.5.725~5.850GHz
• B.5.15~5.25GHz
• C.5.25~5.35GHz
• D.5.725~5.825GHz

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