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EIGRP and OSPF - Technical MCQs

Q1:

Which is true regarding EIGRP successor routes?
  1. A successor route is used by EIGRP to forward traffic to a destination.
  2. Successor routes are saved in the topology table to be used if the primary route fails.
  3. Successor routes are flagged as "active" in the routing table.
  4. A successor route may be backed up by a feasible successor route.
  5. Successor routes are stored in the neighbor table following the discovery process.

A 1 and 3

B 2 and 3

C 1 and 4

D 3, 4 and 5

ANS:C - 1 and 4

Successor routes are the routes picked from the topology table as the best route to a remote network, so these are the routes that IP uses in the routing table to forward traffic to a remote destination. The topology table contains any route that is not as good as the successor route and is considered a feasible successor, or backup route. Remember that all routes are in the topology table, even successor routes.