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    #1

    difficult sentence

    dears sir in this sentence
    TCN BPDUs every Hello Time interval until it gets an acknowledgment
    from its upstream neighbor.
    i don't understand what is the meaning of upstream
    thank you

  1. Soup's Avatar
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    #2

    Re: difficult sentence

    Upstream means towards (e.g., towards the root bridge); downstream means from.

    See page 11 here.

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