Multiple choice

Which routing protocol maintains a topology table separate from the routing table?

  1. IGRP

  2. RIPv1

  3. RIPv2

  4. EIGRP
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D Correct answer
Explanation

EIGRP (Enhanced Interior Gateway Routing Protocol) maintains a topology table that is separate from the routing table. The topology table contains all routes learned from neighbors, including feasible successors and the reported distance from each neighbor. The routing table only contains the best routes (successors) selected from the topology table. This dual-table architecture allows for fast convergence since EIGRP can immediately promote a feasible successor to successor status if the primary route fails. IGRP and RIPv1/v2 do not maintain separate topology tables.

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