One technical correction on TCP slow-start. Although all of the
theory says the window doubles each RTT, it actually only gets
multiplied by a factor of 1.5 each RTT. This is "footnote" is often
passed over when talking about slowstart performance. The reason the
factor is 1.5 instead of 2 is because the delayed ACK algorithm only
sends out one ACK for each two packets received. Slowstart increases
the window by one MSS per ACK, resulting in a factor of 1.5 increase
with each RTT.
--Jamshid
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