Which of the following description about the Router ID of OSPF is incorrect? (Multiple Choice)

• A.The prerequisite for the normal operation of the OSPF protocol is that the router has a Router ID
• B.The Router ID must be manually configured
• C.Router ID must be the IP address of an interface on the router
• D.The Router ID must be the same in the same area, and the Router ID in different areas can be different

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The output information of a switch is shown in the figure. Which of the following interfaces can forward data frames with VLAN ID 40 and do not carry tags when forwarding?

• A.GE0/0/5
• B.GE0/0/3
• C.GE0/0/4
• D.GE0/0/2

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As shown in the figure below, which of the following statements are correct?

• A.The following entry 10.0.12.5 MAC-B exists in the ARP cache of host A
• B.The broadcast address of host A and host B are the same
• C.Host A and Host B cannot obtain each other's MAC address
• D.Host A can ping host B

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The MPLS label header is encapsulated between the data link layer header and the network layer header of the message.

• A.True
• B.False

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Which of the following messages are used for IPv6 stateless address autoconfiguration? (Multiple Choice)

• A.RS
• B.NA
• C.RA
• D.NS

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