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    Question

    In a multi-homed network, BGP route flapping causes

    external instability. Which mechanism MOST effectively prevents repeated advertisement of unstable routes?
    A Route Aggregation Correct Answer Incorrect Answer
    B MED Correct Answer Incorrect Answer
    C Route Dampening Correct Answer Incorrect Answer
    D Local Preference Correct Answer Incorrect Answer
    E AS Path Prepending Correct Answer Incorrect Answer

    Solution

    BGP route dampening suppresses unstable (flapping) routes for a penalty period, reducing global instability. Others influence routing decisions but do NOT stop route oscillations.

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