Border Gateway Protocol
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High Quality Content by WIKIPEDIA articles! The Border Gateway Protocol (BGP ) is the core routing protocol of the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP ) metrics, but makes routing decisions based on path, network policies and/or rulesets BGP was created to replace the Exterior Gateway Protocol (EGP ) routing protocol to allow fully decentralized routing in order to allow the removal of the NSFNet…mehr

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High Quality Content by WIKIPEDIA articles! The Border Gateway Protocol (BGP ) is the core routing protocol of the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP ) metrics, but makes routing decisions based on path, network policies and/or rulesets BGP was created to replace the Exterior Gateway Protocol (EGP ) routing protocol to allow fully decentralized routing in order to allow the removal of the NSFNet Internet backbone network. This allowed the Internet to become a truly decentralized system. Since 1994, version four of the BGP has been in use on the Internet. All previous versions are now obsolete. The major enhancement in version 4 was support of Classless Inter-Domain Routing and use of route aggregation to decrease the size of routing tables. Since January 2006, version 4 is codified in RFC 4271, which went through well over 20 drafts based on the earlier RFC 1771 version 4. The RFC 4271 version corrected a number of errors, clarified ambiguities, and also brought the RFC much closer to industry practices.