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The proprietary EIGRP offered by Cisco
is an advanced distance vector protocol that employs the best features
of link-state routing.
For the most
part, EIGRP configuration is similar to configuring a simple
distance vector protocol such as IGRP. However, like their link-state
counterparts, EIGRP routers use partial updates, special neighbor
relationships, and topological databases to provide optimal
convergence. EIGRP, which is sometimes referred to as a hybrid
protocol, is discussed in Module 5.
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