Which of the following statements about VLANIF interfaces are correct?

• A.VLANTF interface has no MAC address
• B.Different VLANIF interfaces can use the same IP address
• C.VLANIF interface is a three-layer interface
• D.VANIF interface does not need to learn MAC address

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What is the Solicited-node multicast address corresponding to IPv6 address 2019:: 8:AB?

• A.FF02 :: FF08 : AB
• B.FF02 :: 1 :: FF20 : 19
• C.FF02 :: 1 :: FF08 : AB
• D.FF02 :: 1 :: FE08 : AB

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Regarding the IPv6 address 2031:0000:720C:0000:0000:09E0:839A:130B, which of the following abbreviations is correct?

• A.2031:0:720C:0:0:9E0:839A:130B
• B.2031:0:720C:0:0:9E:839A:130B
• C.2031:0:720C::9E0:839A:130B
• D.2031::720C::9E0:839A:130B

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It is known that there are two entries in the routing table of a router. If the router wants to forward packets with the destination address of 9.1.4.5, which of the following statements is correct?

• A.Choose the second item as the best match, because Ethernet0 is faster than serial0
• B.Choose the second item as the best matching item, because the cost of the RIP protocol is small
• C.Select the second item as the best matching item, because the route is a more accurate match relative to the destination 9.1.4.5
• D.Select the first item as the best matching item, because the priority value of the ospf protocol is higher

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Which of the following description are wrong about the Forwarding state in the spanning tree protocol? (Multiple choice)

• A.The port in the Forwarding state will definitely send BPDU packets
• B.The port in the Forwarding state can forward data packets
• C.The port in the Forwarding state does not learn the source MAC address of the packet
• D.Ports in Forwarding state can receive BPDU packets

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