On Sat, 2004-08-28 at 16:16, Marcin Sura wrote: > > I have 512/128 adsl. I wonder why, when I download files at full > speed, pings to site X are about 2000ms. But when I upload files at > full speed, pings to X are about 3000 to 5000ms. Can someone explain > this to me from tcp/ip point of view? ;) 512 is download speed 128 is upload speed When you are uploading a file you are sucking up bandwidth on the smallest portion of your link. This means greater congestion than when doing a download, so the latency on your echo-request packets is higher. HTH, Chris