TCP and UDP window size?


Hello every one,
 
I have a question, I am reading through the user documentation for IPERF and wanted some clarification.

I am typically using Iperf to measure available true bandwidth through switching products at 100mbps, now I want to understand what the best packet window size would be for such a test, so far I have just assume a window size of 128K....
I see there is an equation in the documentation for calculating this but do you really need to be this specific, am I getting the correct results sticking with a 128k packet window ?

Thank you for your feedback.

Lee


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