Which of the following descriptions of Link ID, Data, Type and Metroc in Router-L SA are correct? (Multiple choice)

• A.Link ID represents the local identification of this connection, and the same connection type Link ID represents different meanings
• B.Metric describes the cost of this connection
• C.Data is used to describe the additional information of this connection, and different connection types refer to different information
• D.Type indicates the type of connection

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The following description about BGP, OSPF, ISIS, which the description is true?

• A.BGP runs based on UDP sessions, and the port number used is 179
• B.ISIS runs based on IP protocol, the protocol number adopted is 89
• C.OSPF runs based on IP protocol, the protocol number adopted is 90
• D.BGP neighbor relationship is established based on TCP session, and the port number used is 179

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In the WL AN network, enabled HSB backup group, after the AP has been online on the active AC, then Offline on the standby AC and add the AP information, AP status on the standby AC is Fault. At this time, you need to execute the undo hsb enable command in the HSB backup group view of the standby AC to disable the HSB active/standby backup function, and then execute the hsb enable command to enable the HSB active/standby backup function. At this time, the information on the active AC will be backed up to Standby AC to achieve consistent backup of active and standby information, the AP status on the AC will be displayed as standby.

• A.False
• B.True

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The following is a router BGP output information, which of the following regarding the description of this information is false?

• A.The error occurred at 12:40:39 on March 22, 2010
• B.It may be caused by an incorrect neighbor address
• C.Error Type shows that it is caused by an error in the neighbor relationship
• D.The router's neighbor address is 10.1.1.5

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Which of the following IEEE 802.11 standards corresponds to Wi-Fi 6?

• A.802.11n
• B.802.11ac
• C.802.11ax
• D.802.11b

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