200-101 Question #15: Real Exam Question with Answer & Explanation

The correct answer is A: A successor route is used by EIGRP to forward traffic to a destination.. In EIGRP: (A) The successor route is the best path to a destination - it has the lowest Feasible Distance (FD) and is installed in the routing table and used to forward traffic. (D) A feasible successor is a backup route that satisfies the Feasibility Condition (its Reported Dist

Question

Which statements are true about EIGRP successor routes? (Choose two.)

Options

AA successor route is used by EIGRP to forward traffic to a destination.
BSuccessor routes are saved in the topology table to be used if the primary route fails.
CSuccessor routes are flagged as 'active' in the routing table.
DA successor route may be backed up by a feasible successor route.
ESuccessor routes are stored in the neighbor table following the discovery process.

Explanation

In EIGRP: (A) The successor route is the best path to a destination - it has the lowest Feasible Distance (FD) and is installed in the routing table and used to forward traffic. (D) A feasible successor is a backup route that satisfies the Feasibility Condition (its Reported Distance must be less than the current FD), and it stands by to immediately replace the successor if it fails. Option B is wrong - feasible successors (not successor routes) are stored in the topology table as backups. Option C is wrong - active means EIGRP is actively querying for a new path (a problem state), not a normal successor. Option E is wrong - neighbor information is in the neighbor table; successor routes are in the routing table and topology table.

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