[95243] in North American Network Operators' Group
Re: [funsec] Not so fast, broadband providers tell big users (fwd)
daemon@ATHENA.MIT.EDU (Jeremy Chadwick)
Tue Mar 13 12:22:15 2007
Date: Tue, 13 Mar 2007 09:13:01 -0700
From: Jeremy Chadwick <nanog@jdc.parodius.com>
To: Peter Corlett <abuse@cabal.org.uk>
Cc: NANOG <nanog@merit.edu>
Mail-Followup-To: Peter Corlett <abuse@cabal.org.uk>,
NANOG <nanog@merit.edu>
In-Reply-To: <20070313155257.GA32515@cabal.org.uk>
Errors-To: owner-nanog@merit.edu
On Tue, Mar 13, 2007 at 03:52:57PM +0000, Peter Corlett wrote:
>
> On Tue, Mar 13, 2007 at 08:27:04AM -0700, Roland Dobbins wrote:
> > On Mar 13, 2007, at 8:17 AM, Chris L. Morrow wrote:
> [...]
> >> what business drivers are there to put more bits on the wire to the end
> >> user?
> > BitTorrent.
>
> The download speed is however limited by the upload speed of the peers,
> which acts as its own rate-limit given that the bandwidth on broadband
> connections is somewhat asymmetric.
"Ideally" that's how it's supposed to work, but isn't how it works as of
present-day. Speaking solely about the BitTorrent protocol, upstream
does not affect downstream speed. In fact, there's a BitTorrent client
out there which specifically *does not* share any of the data being
downloaded (thus acting as a pure leeching client):
http://dcg.ethz.ch/projects/bitthief/
--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |
