TCP slow start is mandarory of all TCP implementations. It operates by
observing the rate which acknowledgemenst are returned and injecting new
packets into the network accordingly. It  uses a congestion window on the
senders side.It initializes this window to one segment when a new connection
is made. Each time an ack is received it increments the window by 1 segment.
As the window is incremented by n segments the sender can send n+1 segments.
The through of put data will increase until the window hit its maximum size
or and intermediate router discards packets.

More details on the specifics how TCP is implemeted can be found in TCP/IP
Ilustrated Vol 1 by Richard Stevens.



 wrote in message
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> What is TCP Slow Start? Is it only applicable to SNA? Is it inherit to
TCP?
> When do you use this?




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