A network administrator is planning to use an automatic 6to4 tunnel to transmit IPv6 network. If the IPv4 address of the router interface is 138.14.85.210, the corresponding tunnel address should be
2001:8a0e:55d2:1:230:65ff:fe2c:9a6.

• A.FALSE
• B.TRUE

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Which of the following statements about DSCP is true?

• A.DSCP is only for TCP; IP precedence is for UDP.
• B.The last 2 bits of the DSCP overlap with the IP precedence.
• C.The DSCP contains class selectors for backward compatibility with the IP precedence.
• D.The DSCP is exactly the same as IP precedence; the name change is merely a marketing convention.
• E.The IP precedence and DSCP have no overlapping fields.

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By showing the command as shown below, it can be judged that the fault of the delivery machine is the replacement ring.
A: Option

B: Option

C: Option

D: Option

• A.Option C
• B.Option A
• C.Option B
• D.Option D

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IPv6 devices can obtain information such as the interface address, gateway address, and DNS address through DHCPv6.

• A.True
• B.False

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A switch is running the Rapid Spanning Tree Protocol (RSTP). Upon a topology change/ what happens to dynamic entries in the L2 forwarding table?

• A.The aging timer is set to 15 seconds, so idle entries age out.
• B.All entries are removed (purged).
• C.All entries are removed except for those behind edge ports and the port where TC was received.
• D.All entries are removed except for entries behind edge ports.
• E.Only entries behind the port where TC was received are removed.

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