Slow-Start and Congestion Avoidance (2)


Transition from Slow-start to Congestion Avoidance
TCP keeps a variable "sshthresh" to determine which algorithms are used. 
If cwnd < ssthresh then do slow-start
If cwnd > ssthresh then do congestion avoidance

Algorithms for "ssthresh"
Initial value: arbitrarily high value (ex. advertised window size)
When TCP detects packet loss, it will be set to cwnd/2.