Even more important than the MTU that Rynn mention, is your Tcp Recieve Window. Windows comes otimized for dialup, but with broadband, this really limits you. Go to
www.dslreports.com and download Dr. Tcp. It's the easiest way to change the values (otherwise it's into the registry). Also, they have good speed tests there to show before/after speeds. As far as the value you should use for the RcvWin, it depends on the speed of the line. I use 32767 for my DSL connection, and odds are that would work fine for you too. Most importantly though, run the tweak test a DSLreports (
http://www.dslreports.com/tweaks ), and it'll suggest things you can do to help the connection.
Hope this helps!
