A.Need more memory and label space

B.Keep all labels distributed by neighbors

C.Save memory and label space

D.Only keep labels from next-hop neighbors, discard all labels sent by non-next-hop neighbors

A.MPLS system has a variety of label publishing protocols, such as LDP is a label publishing protocol

B.The label is carried by the header of the MIPLS message and has a global meaning, that is, the label value of all routers cannot be repeated

C.A label is an identifier with a fixed length and only local meaning, which is used to uniquely identify the FEC to which a group belongs

D.MPLS supports single-layer labels as well as multi-layer labels

A.R4 belongs to Level-1 only

B.The device whose system-ID is ee8c. a0c2.baf2, and its type is Level-1-2

C.R4 belongs to Leve1-2 only

D.The device with system-ID ee8a0c2.baf2, its type is Leve1-1

A.The division of FEC is very flexible. It can be based on any combination of source address, address, source port, destination port, protocol type or VPN, etc.

B.The packets of the same FEC will be processed differently in the MPLS network

C.A forwarding equivalence FEC will be assigned a unique label value on all routers

D.MPLS classifies packets with the same forwarding processing method into one category, which is called FEC

A.MAC address table flapping

B.The device CPU usage is too high

C.The device will have a loop alarm

D.A large number of broadcasts can be received on the Host