EGP: Exterior Gateway Protocol
	n Overview – designed for tree-structured Internet – concerned with reachability, not optimal routes n Protocol messages – neighbor acquisition: one router requests that another be its peer; peers exchange reachability information – neighbor reachability: one router periodically tests to see if the other router is still reachable; exchange HELLO/ACK messages; uses a k-out-of-n rule – routing updates: peers periodically exchange their routing tables (distance-vector)