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.

ProtocolTypeAdmin Distance
staticstatic1
EIGRP(summary)Distance Vector5
BGPPath Vector20
EIGRP(internal)Distance Vector90
IGRPDistance Vector100
OSPFLink State110
IS-ISLink State115
RIPDistance Vector120
EIGRP(externall)Distance Vector170
BGP (Internal)Path Vector200
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