How Bgp Works?
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BGP (Border Gateway Protocol) is a routing protocol for exchanging routing and reachability information among autonomous systems (AS) on the Internet. It is the protocol that makes the Internet work and is the backbone of the Internet’s routing system. BGP works by exchanging the information about network reachability among autonomous systems. Each autonomous system (AS) advertises its routes to its neighbors, which in turn pass the information to their neighbors, and so on, until all the networks in the internetwork have the information. Each AS can then select the best route between two networks based on the information it has received. BGP is an exterior gateway protocol (EGP) that is used to exchange routing information between different autonomous systems on the Internet. It is a path-vector protocol that is used to distribute network reachability information between autonomous systems. BGP uses the concept of autonomous systems, or networks, to exchange routing information. Each autonomous system is a network, or group of networks, that is administered by a single organization and that has a common routing policy.