OSPF which permits routers to exchange information with one
another about the reachability of other networks and the cost
or metric to reach the other networks.
The cost/metric is based on number of
hops, link speeds,
traffic congestion, and other factors as determined by the
network designer. Link state routers use
Dijkstra'salgorithm to calculate shortest (lowest cost) paths, and
normally update other routers with whom they are connected
only when their own routing tables change.
single metric (such as hop count) and which exchange all of
their table information with all other routers on a regular
schedule. Link state routing normally requires more
processing but less transmission overhead.
(2000-03-14)