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1453Quick question on delayed-ACKs and updating the congestion window.

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  • Amr A. Awadallah
    Nov 9, 1998
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      Hi,

      Just wondering what is the "correct" way of increasing the congestion
      window during congestion avoidance when delayed-ACKs are used, is it:

      (1) Increase cwnd by 1 segment once cwnd segments are ACKed,

      or

      (2) Increase cwnd by 1 segment once cwnd ACKs are received.

      They are both equivalent if delayed ACKs are not used. But if ACKs are
      for every other received packet, then (2) will increase cwnd at half the
      rate of one.

      Which is correct, (1) or (2) ?

      Thanks,

      -- Amr
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