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2 Comments on “which router is the feasible successor?

  1. vota pota says:

    FD for all the choices is 41152000 (in the question)

    There are 2 parameters in the form of [FD/AD] in each answer. For example answer C has [46152000/41640000], it means that the FD of that route is 46152000 while the AD is 41640000.

    To become a feasible successor, a router must meet the feasibility condition:

    “To qualify as a feasible successor, a router must have an AD less than the FD of the current successor route“

    In four answer above, only answer B has an AD of 120256 and it is smaller than the FD of the current successor route (41152000) so it is the feasible successor -> B is correct.




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