As shown in the figure, if host A has the ARP cache of host B, host A can ping host B.

• A.TRUE
• B.FALSE

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In order to detect the connectivity status of the CAPWAP tunnel, after the CAPWAP tunnel is established, which of the following CAPTAP messages is used by the AC for detection? ()*

• A.Hello
• B.DPD
• C.Keepalive
• D.Echo

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Which of the following OSCan PF protocol packets ensure the reliability of LSA update? ()

• A.B. DD
• B.LSACK
• C.LSU
• D.D. LSR

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In the RSTP protocol, when the edge port receives the configuration BPDU message, it loses the edge port attribute.

• A.True
• B.False

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In the campus network, network reliability can be improved by using link aggregation and stacking technologies.

• A.True
• B.False

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