An interior routing protocol communicates within an
autonomous system.
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An exterior routing protocol communicates between autonomous
systems.
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A distance-vector routing protocol communicates a routing
table periodically to directly connected neighbors while a
link-state protocol communicates changes in the state of the link
when changes occur.
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A hybrid routing protocol has characteristics of both link
state and distance vector.
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Metric is the criteria used by a routing protocol to select
the best route to a destination.
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Administrative distance is a Cisco term that determines a
measure of reliability for each IP routing protocol.
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Convergence is a term used to describe a point when all
routers “see” the same network topology.
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Load balancing is when a router will use multiple paths
equally to forward packets to a single destination.
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Load sharing is when routers will use multiple paths (not
necessarily equally) to forward packets to a single
destination.
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Route redistribution is when networks learned by one routing
protocol are sent to another routing protocol.