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- Newsgroups: comp.dcom.cell-relay
- Path: sparky!uunet!retix.com!tonyg
- From: tonyg@spock.retix.com (Tony "Salty Dog" Goulding)
- Subject: Re: Curious attitude ...
- Message-ID: <1992Jul31.172044.20639@spock.retix.com>
- Organization: Retix, Santa Monica CA
- References: <12445@ntdd-1> <l7g4nrINNfjd@skat.usc.edu> <12467@janice>
- Date: Fri, 31 Jul 1992 17:20:44 GMT
- Lines: 54
-
- In article <12467@janice> grayt@Software.Mitel.COM (Tom Gray) writes:
- >In article <l7g4nrINNfjd@skat.usc.edu> tli@skat.usc.edu (Tony Li) writes:
- >>
- >>
- >> The problem with these LAN protocols
- >> is not in the access but in the internetworking applications.
- >> It is here that ATM is now replacing the existing networks.
- >> Frame Relay has seen widespread acceptance and Frame Relay
- >> is the first example of ATM protocols.
- >>
- >>How do LAN protocols lack internetworking applications? And how does
- >>ATM address this issue? Answer: it doesn't. It provides another link
- >>layer for data and adds other services. Frame Relay is an ATM
- >>protocol? What is SMDS? X.25?
- >>
- >
- >FRame relay is a connection oriented layr 1.5 protocol. It is a
- >fast packet technology that uses the ideas of ATM.
- >The only essential difference between frame relay and
- >cell relay is that one uses variable length packets
- >and the other uses constant length. The essence of ATM
- >is the lack of sequencing, error correction etc.
- >built into these edge to edge protocols.
- >
- >How does ATM address the internetworking problem? As stated above
- >it provides the opportunity to produce a network management model
- >which can make valid predictions about performance.
- >
- >How do LAN protocols lack internetworking applications? They
- >don't. There are a great many of them. So many that that
- >it is impossible to create a network model that can
- >provide valid predictions.
- >
- >The problem here seems to be one of terminology. There is
- >confusion because the B-ISDN groups have termed their cell
- >relay level the ATM level. ATM was concieved in '70's.
- >Cell relay is a refinement which improves on the
- >edge to edge ideas of ATM but is not an original
- >component.
- >--
- >i.sinature
-
- Tom, you <conveniently> ommitted Tony Li's responses to your previous
- assertions - you only addressed his last one. Do I conclude that you
- concur?
- I'm not trying to inflame, as an ATM neophyte I'm enjoying these threads
- and want to make sure that I'm getting all the right info...
- Tony.
-
- --
-
- ==================================================================
- Q: What is the difference between LA and yoghurt?
- A: One is cultured...
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