10.2 IP Routing Protocols  
  10.2.7 IGP and EGP  
An autonomous system is a network or set of networks under common administrative control, such as the cisco.com domain. An autonomous system consists of routers that present a consistent view of routing to the external world.

Two families of routing protocols are Interior Gateway Protocols (IGPs) and Exterior Gateway Protocols (EGPs).

IGPs route data within an autonomous system. Examples of IGPs include the following:

  • Routing Information Protocol (RIP) and (RIPv2)
  • Interior Gateway Routing Protocol (IGRP)
  • Enhanced Interior Gateway Routing Protocol (EIGRP)
  • Open Shortest Path First (OSPF)
  • Intermediate System-to-Intermediate System protocol (IS-IS)

EGPs route data between autonomous systems. An example of an EGP is Border Gateway Protocol (BGP).

 

Web Links

What IP Routing Protocol Should I Use?

http://www.faqs.org/faqs/cisco-
networking-faq/section-28.html