How is the sending rate typically regulated in a TCP implementation?

Question

Answer

By keeping a window of size cwnd over the sequence number space, and making sure that no more than cwnd bytes of data are outstanding (i.e, unACKnowledged).  The size of cwnd is regulated by AIMD.

Answer

By using the retransmission timeout timer and counting the number of bytes sent since the last timeout to compute the sending rate since that last timeout,  and then making sure its sending rate never exceed the rate set by AIMD.

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How is the sending rate typically regulated in a TCP implementation?

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