1.[单选题]The Border Gateway Protocol(BGP) is an interautonomous system (1) protocol. The primary function of a BGP speaking system is to exchange network (2) information with other BGP system. This network reachability information includes information on the list of Autonomous System(ASs) that reachability information traverses. BGP-4 provides a new set of mechanisms for supporting (3) interdomain routing. These mechanisms include support for advertising an IP (4) and eliminate the concept of network class within BGP. BGP-4 also introduces mechanisms that allow aggregation of routes, including (5) of AS paths. These changes provide support for the proposed supernetting scheme.
- A.reservation
- B.relation
- C.aggregation
- D.connection