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- Newsgroups: comp.protocols.tcp-ip
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- From: Steinar.Haug@delab.sintef.no (Steinar Haug)
- Subject: Re: Info wanted on TCP/IP vs OSI 7 layer
- In-Reply-To: ketil@edb.tih.no's message of Thu, 28 Jan 1993 10:16:55 GMT
- Message-ID: <STEINAR.HAUG.93Jan28124406@delab.sintef.no>
- Sender: news@aun.uninett.no
- Nntp-Posting-Host: tosca.er.sintef.no
- Organization: SINTEF DELAB, Trondheim, Norway.
- References: <SALKIELD.93Jan26224429@csqx.cs.rhbnc.ac.uk>
- <1993Jan27.115319.21112W@lumina.edb.tih.no>
- <1993Jan27.141654.1@ptavv.llnl.gov>
- <1993Jan28.101705.6840W@lumina.edb.tih.no>
- Date: Thu, 28 Jan 1993 11:44:06 GMT
- Lines: 35
-
- ketil@edb.tih.no (Ketil Albertsen,TIH) writes:
- > Evidence 1: The real world. The vast majority of networks following OSI
- > standards do run CONS. To put it squarely: They run X.25, which is CONS.
-
- Actually a lot of them run X.25 (1980), which, as far as I know, is *not*
- a full CONS. This was the case here in Norway at least a couple of years ago -
- The Norwegian Telecom ran a mix of X.25 (1980) and X.25 (1984). I don't know
- what the situation is today. Also, according to Olav Kvittem, not even X.25
- (1984) is a full CONS, because it doesn't handle a normal 20-octet NSAP.
-
- > starting point. Eg, is there *any* OSI *applications* that actually uses
- > connectionless mode? (Note that I was careful to state 'OSI is CO' in
-
- Yes, DECnet Phase V...
-
- > In essence, those fighting for CLTS want it for running their non-OSI
- > Internet applications.
-
- That's your interpretation. I don't expect everybody to agree.
-
- > NE does *not* do what it is supposed to according to X.200. I have a
- > definite impression that TP4 was included with the sole purpose of "selling"
- > OSI to the IP camp. IMHO, TP4 should never have been included. It is OK
-
- So what do we use if we want reliability? TP0 over X.25 is simply not good
- enough. TP0 and TP4 are by far the most commonly implemented...
-
- > As long as we keep the non-OSI-spirit TP4 out of it, it is much simpler.
-
- If I'm not allowed to use TP4, I'll stick to my Internet protocols, thank you.
-
- Steinar Haug, system/networks administrator
- SINTEF DELAB, University of Trondheim, NORWAY
- Email: Steinar.Haug@delab.sintef.no,
- sthaug@idt.unit.no, steinar@tosca.er.sintef.no
-