Rwin
From Wikipedia, the free encyclopedia
In computer networking, RWIN (TCP Receive Window) is the amount of data that a computer can accept without acknowledging the sender. If sender has not 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.
The default RWIN for broadband is like having a tiny straw in a thick milkshake; only so much can get through the straw (line), so fast. By putting a larger straw (higher RWIN) in that same thick shake, you allow more shake (data) to come through sooner (thus improving speeds), to a point that is. After which, there is no more improvement, and shake (data) can start spilling all over (packet loss), if your line is lossy. So the key is, to find an RWIN that fits your line just right.
[edit] More Info
Here are directions on how to get to some good information about RWIN on DSL Reports.com.
- Click Information on 'Tweaking' your TCP stack
- At the top of that page, select "Receive Window" from "Jump to topic". Then click the "Show" button.
[edit] External links
The following three handy tools are from dslreports.com
