This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: EIGRP operation
Prompt focus: In EIGRP, the feasibility condition that allows a route to be installed as a feasible successor requires that:
Why the correct answer works
The advertised distance of the neighbor is less than the feasible distance of the current successor
Correct. The feasibility condition requires the neighbor advertised distance to be less than the current feasible distance.
Why the tempting wrong answer fails
A feasible successor is a backup with a usable metric, not necessarily the highest metric.
Plain-language takeaway
A feasible successor is a loop-free backup route. The feasibility condition is satisfied when a neighbor's advertised distance, also called reported distance, is strictly less than the local router's feasible distance to the destination, guaranteeing the neighbor is closer and the path…
Simple analogy
Think of eigrp operation like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.