Date: Tue, 9 Jul 1996 15:05:56 -0500 From: "Bradley Dunn" <dunn@harborcom.net> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: hardware@freebsd.org Subject: Re: cable vs. ISDN Message-ID: <199607091911.PAA03381@ns2.harborcom.net>
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On 7 Jul 96 at 16:50, Michael Smith wrote: > Troy Arie Cobb stands accused of saying: > > > > All questions/issues of bandwidth aside, the real issue > > as I see it w/ cable networking is that it is BROADCAST > > ethernet. That is, every one in your cable-division (i.e. > > all of those houses connected to the same switch > > as you are) will get the same packets. Drop a wee little > > This is dubious. Ive seen no indication one way or another, but I'd > imagine that you'd have to sniff the cable side of the box, not the > inhouse side to see anything. What box, the cable "modem"? All diagrams of this technology I have seen have the modem in the house, connected via ethernet to the computer. In this case I do not think sniffing the cable side would be too difficult for the technically inclined. Of course it would be significantly more difficult if this box were buried outside or on a utility pole. The point is a valid one, though, I think. Cable was engineered from the start to be a broadcast media. AFAIK, there is no concept of a local loop with cable. The signal is just broadcast over the wires, with repeaters installed where necessary. Of course, I could be wrong, I'm not a cable guy. :) Bradley Dunn <dunn@harborcom.net> Harbor Communications
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