Routing Protocol Basics

I wanted to take the opportunity to post some core basics for those of you just getting started with Cisco and routing protocols.  The table below shows the protocol, the type of routing protocal and the default administrative distance of that protocol.

Protocol	Type	Admin Distance
static	static	1
EIGRP(summary)	Distance Vector	5
BGP	Path Vector	20
EIGRP(internal)	Distance Vector	90
IGRP	Distance Vector	100
OSPF	Link State	110
IS-IS	Link State	115
RIP	Distance Vector	120
EIGRP(externall)	Distance Vector	170
BGP (Internal)	Path Vector	200