Refined Congestion Control cont’d

Refined Congestion Control cont’d

• Forward-most SACKed data is stored in a new variable, snd.fack. During non-recovery states,

snd.fack = snd.una

• If there have been no retransmissions, the amount of data in the network at any time is given by:

awnd = snd.nxt - snd.fack

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