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RE: grrrrr.....


  • To: <ukha_d@xxxxxxx>
  • Subject: RE: grrrrr.....
  • From: "Gerard McGovern" <stuff@xxxxxxx>
  • Date: Wed, 1 May 2002 20:37:15 +0100
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

> > Take UUNet, who operate one of the biggest backbones in the
> > UK if not the world. Between Europe and the USA, UUNet have
> > two 2.5 Gbps lines. Imagine if every broadband user in UK, of
> > which there are 200,000, had 10 Mb/sec of bandwidth. Even
> > operating at contention ratios of 100:1 (which is way too
> > high), you would need just under 20 Gbps of bandwidth.
> >
>
> You are assuming that all 200,000 use it fully all the time.
> However if the volume is the same or similar, then everyone
> gets faster
> response and the actual amount of data stays the same, I can see that
> however the bandwitch could get used up for other applications, but
> given the current use of the internet I can see that 10Mb/sec is ok.
> After all we have had 10Mb/s Ethernet for over a 15 years, sure you
> might peak at 10mb/s but it does not normally mean that everyone on
> you're segment will all the time use all the bandwidth.

Well, I have used a contention ratio of 100:1, which is even twice that
of current ADSL services. Even taking into concurrent bandwidth, the
network still couldn't cope.

Don't get me wrong, 10 Mbit/sec is lovely and I'd love to have it now.
But it will be a few years before a decent level of service can be
provided.

G



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