On Saturday, September 6, 2003, at 12:34 PM, Lee McIntosh wrote:
on 9/6/2003 10:52 AM, Bruce Johnson at [EMAIL PROTECTED] wrote:
Heh, I knew all that, but it was a different application that reported theIf turbo internet was reporting 8-10K download speeds it was flat-out lying. 3-5K is about average for 56k modems on average phone lines. That requires a really clean connection. Remember, 56K will never get higher than 51K absolutely max, and 41-48K are far more common connection speeds.
speeds. I did the math with the time it took and how large the file was,
and it was correct. That's why the question...
Here's another weird observation, near the end of some downloads, like the
last 500k or so, it'll report downloading at 11k o.O
*if* you are downloading text or plain old html, which compresses well in the hardware compression mechanisms used in modems, then you can see more kb being downloaded than is actually being transmitted, which results in "high" transfer speeds, since your computer is counting the bytes the file takes up coming out of the modem, not the bytes it took up between modems. (which is your actual transfer rate)
Previously compressed data: stuffit files, jpegs, gif's etc, do not gain much advantage from the hardware compression, if anything.
Also, don't forget, there's a significant overhead associated with tcp/ip transfers, as well...there are a lot of bytes used up in addressing each packet, and a lot of pckets going back and forth between the two computers keeping tabs on each other as the file transfer takes place.
For that reason, file transfer times are a good judge of throughput but not necessarily so good at identifying the actual modem speed.
--
"Wherever you go, there you are." - B. Banzai, Ph.D. Bruce Johnson
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