A.AP obtains IP address

B.AP and AC establish a CAP7AP tunnel

C.AP goes online, AC delivers service configuration to AP

D.AP discovers AC through option 43

A.R1 and R3 can only establish the neighbor relationship of Level1-2

B.R1 and R2 can only establish a neighbor relationship of Level1-1

C.R3 and R4 establish the neighbor relationship of Level1-1 and Level1-2 at the same time

D.R1 and R4 can only establish a neighbor relationship of Level1-2

A.In the PIM-SM network, the newly started multicast router needs to use Hello messages to discover neighbors and maintain neighbor relationships

B.Election of DR in multi-router network segment through Hello message

C.The routers periodically use Hello messages to keep in touch

D.The Hello message is sent to the multicast address 224.0.0.5

A.The interface address of the router is 10112.1

B.The cost value of the router interface is 1500

C.The Router ID of the router is 10.012.2

D.The router interface is BDR

A.Provide optical ports with different rates

B.Switch traffic between service boards

C.Responsible for the data plane of the system

D.Responsible for the control plane of the system