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TCP Congestion Control Algorithms:
Overview
Slow start
- Starting with one or two packets, aggressively increase the sliding window
- Reenter this mode upon loss
Congestion avoidance
- Once a certain window size is reached, increase it much more slowly
Fast retransmission / fast recovery
- A packet has been lost, but other packets that were sent after it were received
- Resend the lost packet and throttle down the transmission rate without entering slow start