Dial-up

A little info about the different values you can change in ItweakU.

The data is broken into what are called packets (also called datagrams). Each TCP packet consists of a 40 byte header, which includes routing information, and the actual data that is being sent or received (called the data segment). Unless the sender and receiver of that data are on the same network, the packet must be routed through one or more intermediary systems which are responsible for forwarding it on to it’s ultimate destination. And because of the nature of the Internet, there is no guarantee that two packets, both having the same sender and destination, will follow the same route.

Each of these hosts is configured to handle Maximum Transmission Unit (MTU), which is the number of bytes that will be sent as one packet. So if you have a host that sends at 1500 and you have 576 as your setting, the host’s packets are broken into bits, and since 1500/576 are not even, the third packet will only be fragments. This can have a negative effect on the throughput.

I will not go in to the Maximum Segment Size (MSS) since ItweakU handles that automatically. It's the MTU – 40. But the MSS are useful when you are going to calculate the Receive WINdow (RWIN). That’s the number of bytes that can be buffered, pending a receipt from the sender. A good RWIN value should be 2-10 Times the value of MSS. For Example, a system with MTU of 576 (MSS 536) could have a RWIN value of 4288 (536*8).

The Time To Live (TTL) are the times a packet can be resent every time it tries the value lowers 1. When it comes to 0 it will be rejected.

What settings are recommended in Windows 9x?

Well I have written recommended on the values that I think would be good. However every system are different and the values can’t be the same on every one, so try a little different and see if the connection speed improves.

For more info go to: http://www.catalyst.com/support/tips/tip05.html

There you can get more info about this subject.

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