A.This router has established an adjacency relationshipC. This router supports external route import

B.This router is the DR

C.The router of this router ID for 10.0.12.1

A.IGMPv1The message type does not contain a member leave message

B.IGMPv2Message types include member leave messages

C.IGMPv1Support general group query

D.IGMPv2Specific group queries are not supported

A.link-lsa

B.Intra-Area-Prefix-LSA

C.Inter-Area-Prefix-LSA

D.Inter-Area-Router LSA

A.Modify IS-Cost value of the IS interface

B.Modify IS-IS sending interval of IIH by port

C.Modify IS-Level of the IS interface

D.Modify IS-IP address of the IS interface

A.MPLSThe tag is 4 bytes long and is encapsulated between the link layer and the network layer.

B.By default, the device supports PHP feature, the Egress node that supports PHP assigns the label value of 3 to the penultimate hop node.

C.When the value of the label is 0, it means that the label must be popped, and the forwarding of the packet must be based on IPv4.4

D.If the stack bottom label in the label is S=0, it indicates that the label is the stack bottom label, and the IP is directly performed.Forward.