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- Newsgroups: comp.dcom.lans.ethernet
- Path: sparky!uunet!utcsri!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: Re: Is Starlan really Ethernet?
- Message-ID: <Bs5sn3.4Kz@zoo.toronto.edu>
- Date: Wed, 29 Jul 1992 16:33:02 GMT
- References: <92205.101555LORAX@wvnvm.wvnet.edu> <BrwKyM.67t@zoo.toronto.edu> <7520@public.BTR.COM>
- Organization: U of Toronto Zoology
- Lines: 29
-
- In article <7520@public.BTR.COM> thad@public.BTR.COM (Thaddeus P. Floryan) writes:
- >>Starlan is vaguely similar to 10BaseT, but is not in any way compatible
- >>with it.
- >
- >Is this REALLY true?
- >I'm curious, because the original StarLAN was 1Mbit/S and bears the label
- >"802.3e-1988 1BASE5 StarLAN 1Mbit/S Ethernet".
-
- Just because it is 802.3something does not mean it is Ethernet. Just because
- the label on it says "Ethernet" doesn't mean it is either. Ethernet --
- which is, mind you, a registered trademark -- refers to a specific set of
- networking technologies running at 10Mb/s. Somebody got overenthusiastic
- with the labelling.
-
- The 802.3 core standard doesn't define any specific data rate. In practice,
- the 1Mb/s variant of it is a historical curiosity only. It is not in any
- way compatible with 10Mb/s technology like Ethernet.
-
- >There are bridges from StarLAN to the newer StarLAN-10 (at 10Mbit/S).
- >StarLAN has always been CSMA/CD, etc. and companies such as Hewlett-Packard
- >have interoperated StarLAN with "conventional" Ethernet.
-
- You can bridge anything to anything, just about. If "interoperable" is
- to have any meaning when talking about low levels like this, it can't
- realistically mean "can be connected together if you put enough electronics
- in between".
- --
- There is nothing wrong with making | Henry Spencer @ U of Toronto Zoology
- mistakes, but... make *new* ones. -D.Sim| henry@zoo.toronto.edu utzoo!henry
-