wentlanc
You Can't Fix Dumb..
join:2003-07-30
Maineville, OH
| reply to PhoenixDown
Re: Poor Babies
Bacause with cable you have to share the bandwidth with your neighbors. With DSL, you have dedicated bandwidth to you. You could find that 2 of your 3 megs on your cable provider is unusable becaus of all of the broadcast, multicast, and normal unicast traffic. When you get a web page, everyone on the network has to get it and then subsequently drop it. That chews up bandwidth. The old rule of traditional unswitched ethernet was that 40% utilization is almost too much. Cable operates in exactly the same fashion.
puritan |
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ruscorp
I Never Stop Posting For You
Premium
join:2002-08-29
Earth
clubs:   | It's all shared at some point. |
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BonezX
Basement Dweller
Premium
join:2004-04-13
Canada | well what's 4500 of 5000, that's over 40% |
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Freezone
join:2000-09-29
Southfield, MI | reply to ruscorp
Yes, but I am annoyed by all the traffic on my cable con when my dsl is silent. When the lights flash on my dsl modem chances are i know what is going on. My cable modem is constantly going. |
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ruscorp
I Never Stop Posting For You
Premium
join:2002-08-29
Earth
clubs:
| said by Freezone  :
Yes, but I am annoyed by all the traffic on my cable con when my dsl is silent. When the lights flash on my dsl modem chances are i know what is going on. My cable modem is constantly going.
I've had both cable and dsl as well. I've always wondered why that was. |
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs: | Those are ARP requests.
Perfectly normal, and harmless.
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»www.fiberal.ca/ We need Arnie! |
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rolande
Certifiable
Premium,Mod
join:2002-05-24
Powell, OH
clubs:
Host:
Linksys
AT&T Midwest
| reply to ruscorp
said by ruscorp :
It's all shared at some point.
That IS the general idea of how networks operate. But, for those of you who are protocol challenged, a protocol like CMTS that is shared at layer 2 without any deterministic qualities like a TDM network makes a whole connection act like garbage when enough other stations on the segment are busy. Most DSL providers on the other hand are typically using ATM at layer 2 with either PPPoA or PPPoE for the client connectivity. This provides a whole different class of connection quality that is scalable and fully manageable by the providers. Cable providers don't have that flexibility on their networks and have little ability to control the congestion in their networks at the edge except to enforce harsh ToS agreements to limit upstream traffic. DSL's downfall is usually the physical limitations of the wire to the customer's premises. Luckily for the cable companies this is something they don't have to worry about. Everyone can connect just the same. They just have to try and control upstream bandwidth usage without a technical way to do it with the access protocol to avoid upstream congestion within their nodes.
Shared interfaces at aggregation points like 100Meg or Gig or OC-3, OC-12, OC-48 etc. are a complete world apart from the shared technology behind the DOCSIS standard. You are trying to compare shared service within an access technology versus shared service within a core network technology. So you can't even begin to compare these apples and oranges. Obviously speed of those technologies is a factor. But, aside from the speeds, the methods of traffic queueing that can occur on those types of interfaces, depending on the layer 2 protocol, is like comparing a Ferrari to a Pinto. When you aggregate thousands of broadband connections into upstream network connections that are shared in this manner, that is whole different kind of shared connection than cable uses.
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Ignorance is temporary...stupidity lasts forever! |
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
| Yes, that is the technical way of looking at things.
I look at the speed test archive here at dslr:
»/archive
Judge for yourself.
Theory vs execution!
(As was said earlier, either DSL or Cable can be done well, or done poorly.)
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»www.fiberal.ca/ We need Arnie! |
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ruscorp
I Never Stop Posting For You
Premium
join:2002-08-29
Earth
clubs:
| reply to 3SGTE
said by 3SGTE :
Those are ARP requests.
Perfectly normal, and harmless.
All the time and never happening with DSL? Are you sure? |
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Hot_Rats
He's Not Tor Johnson
join:2003-07-08
Indianapolis, IN
clubs:
| reply to wentlanc
said by wentlanc :
You could find that 2 of your 3 megs on your cable provider is unusable becaus of all of the broadcast, multicast, and normal unicast traffic.
You could, but so far, I'm finding that I can maintain a steady 2.7-2.9 Mb down, at virtually any time of day/night/week, just like two years ago when it was 2 Mb down and I could maintain 1.7-1.9 Mb consistently.
I had DSL; 768/128. It was OK, and I did get the advertised speed (heck, I'm within 2000 feet IIRC) but after dealing with Ameritech through lie after lie after billing f*ckup after billing f*ckup, well, let's just say we parted ways and I'm far happier with my provider these days. The only way I'd go back to DSL is for a business account, because RR's business class stuff is a ripoff.
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"I'm downloading with a 56k modem. Can you give me step by step instructions on how to install x86 Solaris?? Please reply back. Thanks." |
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
| reply to ruscorp
Yes.
I cannot speak to the exact technical reason, but it was explained in detail by a network admin in the Cogeco forum a while back.
(I couldn't find the link)
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»www.fiberal.ca/ We need Arnie! |
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