An extension of the Border Gateway Protocol, an Internet protocol that enables groups of routers (called autonomous systems) to share routing information so that efficient, loop-free routes can be established. BGP is commonly used within and between Internet Service Providers (ISPs).
The fourth version of Border Gateway Protocol, the predominant interdomain routing protocol used on the Internet. BGP4 supports Classless Inter-Domain Routing (CIDR) which enables routing between aggregated networks or "supernets." Internet regulating authorities now expect every Internet service provider (ISP) to use CIDR for routing. Back
BGP Version 4. The version of BGP currently being used, as defined by RFC 1771.