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Re: [PLUG] [OT] Fiber in PA
On 07 Dec, 2004, at 19:55, Kevin Brosius wrote:
That sounds strangely like the upper end of DSL (over copper, I'd
guess.) Low cost, and 768k up is the speed cap I've heard for every
DSL
line I've tried to quote around here.
The 768K up link speed max is either a modem design problem or network
design issue.
It is not an inherent limitation of ADSL.
The reason that virtually every ADSL network offers much higher
download speeds than upload is because the amount of traffic involved
is actually smaller!!!
Yes smaller. The game that is played here is the "caching server" game.
The probably is that "download" materials will be found on the cachinge
server, and therefore NOT have to traffic the network backbone to the
Internet. Whereas ALL upload traffic will have to traffic the network
backbone out to the Internet. ... at least, that is the theory.
Are there really twice as many hits on the caching server and therefore
that much less of a load on the backbone between downloads and uploads?
I don't believe that anyone has actually examined that part of the
theory. I've never seen any published results.
The upload/download tradeoff was also viewed from the "consumer" point
of view -- very few consumers are interested in uploading anything more
than an occasional email message... while they want to download LOTS of
stuff all the time.
T.T.F.N.
William H. Magill
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magill@mcgillsociety.org
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magill@mac.com
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