Hi
First I want to tell you whenever U tried to download any file fm the web, It start in kB/sec not in kb/sec , that's why we multiplied with 8.
That's 8 kB/sec = 64 kbits/sec. (1 Byte= 8 bits)
Bandwidth is divided into two channels Upstream & downstream, Up-means u are uploading(sending info on to the server), dn- means u r downloading.
This is right when you treid to d/l any file fm the transfer rate goes high after that it goes dn bcz in that case both channels are utilized then after that it becomes constant ( if u hv dedicated connection).
One thing more d/l is also depend upon the file size, heavy file size would give you less transfer rate.
So enjoy ISP mathematics ....
Him007