Date: 24 Dec 2001 14:30:08 -0800 From: swear@blarg.net (Gary W. Swearingen) To: "111" <k_a_kinsey@netzero.net> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: any difference between cable(TV) and phone line high speed internet Message-ID: <hk1yhktfnz.yhk@localhost.localdomain> In-Reply-To: <01d501c18c93$1a0c9d40$ec41d5cc@daleco> References: <200112211956.fBLJu1d16378@ptavv.es.net> <plr8plu7xz.8pl@localhost.localdomain> <01d501c18c93$1a0c9d40$ec41d5cc@daleco>
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"111" <k_a_kinsey@netzero.net> writes: > From: Gary W. Swearingen <swear@blarg.net> > Sent: Sunday, December 23, 2001 12:07 PM > Subject: Re: any difference between cable(TV) and phone line high speed > internet > > > > > Well, the interconnect to your desk is not shared, but congestion can > > > occur anyplace other than that and it's all shared from that point. That form of quoting is wasteful and makes it look like I wrote that. I didn't. > Telcos/Cablecos use ATM to guarantee high bandwidth and uptime. Their > modems use PPPoATM (or PPPoE) 'cuz that's what they're set up to do > (IMHO, I may very well be wrong.) I thought that some cable users have to actually use PPPoE-smart software on their computers, whereas the PPPoATM is only in the modem and TELCOM. Anyone know for sure? > >Some ISPs configure the modem as a bridge so it looks to > > your system like one of your ISP's NICs extended to your site. > > > That's basically the way my cable is set up. That's where the > line about 'shared bandwidth' (or 'subnets', below) comes in. I don't think so. I think it was about the bandwidth between your modem and your ISP and whether or not your modem is configured as a router or bridge or is on a subnet is not related. My TELCO could (and might have in some places and times) run a dedicated wire between my "Central Office" (where my modem wire ends) and my ISP. But mine uses an ATM network instead. Either way (as I understand it), they can guarantee bandwidth without "sharing", even when my ISP had me using bridging so my modem looked like one NIC on a subnet. It was on a subnet, but only at my ISP where they have it attached via some high-speed network to the Internet. It's similar for the router-mode modem. With Cable, the line between modems and the cableco equivalent of a Central Office is shared. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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