The Slow-Start Algorithm

Applet 5.2
	This animation file: gzipped. The script used: slowstart_motivation.tcl Parameters for this animation: `ns slowstart_motivation.tcl 10 linearss 2` Description: Same as Applet 5.1: Links n0-n1 and n4-n5 are 10Mbit/s, 2ms. Links n1-n2 and n3-n4 are 256Kbit/s, 10ms. Link n2-n3 is 1Mbit/s, 5ms. Queue in n1 has been limited to 10 packets. This time, the TCP used in n0 implements a linear increase slow-start at the beginning of the connection. Note that in two seconds the congestion window has grown up only to less than 10 segments. Transmitted sequence number and send window:

Applet 5.2

This animation file: gzipped.

The script used: slowstart_motivation.tcl

Parameters for this animation: ns slowstart_motivation.tcl 10 linearss 2

Description:

Same as Applet 5.1: Links n0-n1 and n4-n5 are 10Mbit/s, 2ms. Links n1-n2 and n3-n4 are 256Kbit/s, 10ms. Link n2-n3 is 1Mbit/s, 5ms. Queue in n1 has been limited to 10 packets. This time, the TCP used in n0 implements a linear increase slow-start at the beginning of the connection. Note that in two seconds the congestion window has grown up only to less than 10 segments.

Transmitted sequence number and send window: