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tcp scale window

carl_townshend
Spotlight
Spotlight

Hi all

Can amyone tell me what this is and what it is for? is it the amount of data that can be sent without an ack ?

3 Replies 3

Joseph W. Doherty
Hall of Fame
Hall of Fame

It provides a method to have a receive window larger than permitted by the original TCP specification (16 bits, or 64K). You can "scale" the 16 bit value by some power of 2.

what is the receive window?

You might start here:

http://en.wikipedia.org/wiki/TCP_tuning, where RWIN (TCP receive window) is mentioned. Much more can be found if you use an Internet search engine.

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