received acknowledgement for the first packet it sent, it will stop and wait and if this wait exceeds a certain limit, it may even retransmit. This is how TCP achieves reliable data transfer. How to find your RWIN: 1) Open up a DOS Prompt box: Start>Run>command 2) Type: ping -l #### dslreports.com #### is your MSS. (MSS = MTU - 40) Example Screenshot Take your average large packet ping + 50%, Mexico 56k , Mexico, IN 56k MexicoMexico , 56k Indiana, Mexico 56k
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