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

B. MPLS supports single-layer tags as well as multi-tier tags

C. The label is carried by the head of the MPLS message and has a global significance, that is, the label value of all routers cannot repeat

D. A tag is a fixed-length, locally only meaningful identifier that uniquely identifies the FEC to which a group belongs

A. RSTP has a smaller overhead

B. RSTP does not converge based on timer

C. RSTP has a smaller timer

D. RSTP increases the variety of port states

A. For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.

B. When a route to a BGP peer is received, a routing policy is enforced to filter unwanted BGP routes that are not added to the local BGP routing table.

C. The filtering relationship between Route-Policy's noodes is "or." ", that is, as long as a node filter is passed, it can pass through the Route-policyo

D. In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationships.

A. Two geographically separated networks must belong to different sites

B. A site is a set of IP systems, and a network of hosts cannot be called site

C. Terminals connected to the carrier network through the same CE may belong to different sites

D. Under no circumstances can different sites that belong to the same VPN use overlapping address spaces

A. RI can make Efilter-policy import filter the loopback route for R3

B. RI, you can use the Make Efilter export command in Area 1 to filter loopback routes for R3

C. R2 you can make Efilter in Area 0 The import command to filter the loopback route for R3 on

D. R2, you can use the filter po y export command to filter R3's loopback route