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can some one plese explain how to calculate TCP window size in windows 7 .is it depend on the initial link quality or does it calculate dyamicaly depend on the link quality .what are the parameters used ?

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asked 25 Jul '12, 21:58

gayandis's gravatar image

gayandis
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edited 25 Jul '12, 22:16


Initail values are "fixed" (actually configurable), but there is also a feature in TCP/IP Stack of Windows 7 called "TCP Receive Window Auto-Tuning".

Take a look at these articles from "The Cable Guy"
http://technet.microsoft.com/en-us/magazine/2007.01.cableguy.aspx
http://technet.microsoft.com/en-us/library/bb878127.aspx

@Landi gave a presentation at Sharkfest 2012 about some issues with TCP receive window scaling.

http://sharkfest.wireshark.org/sharkfest.12/

Look for: "Effects of Receiver-Side Window Scaling on Enterprise Networks"

Regards
Kurt

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answered 31 Jul '12, 07:24

Kurt%20Knochner's gravatar image

Kurt Knochner ♦
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accept rate: 15%

edited 31 Jul '12, 07:33

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question asked: 25 Jul '12, 21:58

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last updated: 31 Jul '12, 07:33

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