BGP Neighbor Identification Components

AE

In a Border Gateway Protocol (BGP) configuration, two components are used to identify a neighbor. These components are:

A. Autonomous System Number (ASN): An ASN is a unique number that identifies an autonomous system (AS) in the internet. ASNs are assigned by Regional Internet Registries (RIRs) and are used by BGP routers to exchange routing information. BGP routers only exchange routing information with routers that belong to the same AS or with routers that have explicitly defined peering relationships.

C. Router ID: A Router ID (RID) is a unique identifier that is assigned to each router in a network. The RID is used by BGP routers to identify their neighbors and to establish BGP peering sessions. The RID is typically assigned based on the highest IP address assigned to a loopback interface on the router.

Therefore, option A and C are the correct answers. Option B (version number) and option D (subnet mask) are not used to identify a neighbor in a BGP configuration. Option E (IP address) is partially correct as it is used to identify the neighbor, but only when combined with the ASN and RID information.