Which metric types does IS-IS protocol support? (Multiple choice)

• A.wide
• B.Tos
• C.Narrow
• D.default

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If two devices are connected, and one of the devices supports the BFD detection function, and the other device does not, which feature of EFPD can be used by the device that supports the BED detection function to achieve link connectivity detection?

• A.Two-way detection
• B.Quick handshake
• C.One-arm echo
• D.Interface status linkage

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After the dual-system hot backup is configured, the main and backup channels cannot be established. The information on the active device cannot be backed up to the backup device normally, causing the dual-system hot backup function to be abnormal. What is the possible cause of the failure? (Multiple choice)

• A.The retransmission times and retransmission intervals of the active and standby service packets at both ends are inconsistent
• B.TCP channel is not established
• C.The priority of the two AC is the same
• D.The source IP address and source port number of the local end are inconsistent with the destination IP address and destination port number of the opposite end

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As shown in the figure, four routers in the same LAN are running lS-IS, where R1 is DIS, then R2, R3, R4 establish adjacency relationship with R1 respectively, and no adjacency relationship is established between R2, R3, and R4.

• A.False
• B.True

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In dual-link hot backup, AP will establish a CAPWAP link with the main AC and backup AC.

• A.True
• B.False

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