The Symmetrical Nature of Modems
If you have, let’s say a 33.6Kbps modem, this does not mean the total throughput (upload + download rates) of your modem is 33.6 Kilobits per second. You can, in fact, upload at that rate (or a little lower due to lag and stuff) as well as download. So your total throughput is actually 67.2Kbps. Thus, if you’re exchanging files over the net, use the symmetric nature – upload and download at the same time. Now 56.6K modems are assymmetric. They download at 56.6, but only upload at 33.6, giving total throughput of 90.2Kbps. Did I spell symmetrical right?
1:15am (GMT +10.00) tomorrow 
