Wireless users with the same user VLAN and the same SSID can access the Internet, but they can't access each other.
What could be the cause of this phenomenon?

• A.The user's gateway device is configured with an ACL to prevent mutual access between users.
• B.The ACL is configured on the AC to prevent mutual access between users.
• C.User isolation is configured on the wireless service-set to prevent mutual access between users.
• D.Port isolation configured on the switch connected to the AP prevents mutual access between users.

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Spread-spectrum technology is the basis for transmitting wireless data using the ISM band.

• A.False
• B.True

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What is the function of the AC in the wireless network (Select 3 Answers)?

• A.Wireless intrusion detection
• B.Send beacon frame
• C.Implement roaming function
• D.Centralized management AP

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MIMO (Multiple input and multiple output), that is, multiple input and multiple output, wireless access points and clients using 802.11n technology can simultaneously transmit data using up to three spatial streams, and the theoretical rate can reach 600 Mbps.

• A.False
• B.True

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Which of the following statements are correct? (Multiple choice)

• A.WPA2 uses 802.1X authentication
• B.When the user obtains the IP address successfully, the user triggers the HTTP packet of the user. In this case, the user is forced to redirect to the portal server to perform the authentication process.
• C.WPA2 PSK authentication requires the user to enter username and password to connect
• D.WAPI is China's wireless LAN national standard system

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