Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!bionet!agate!ucbvax!MITRE.MITRE.ORG!mckee
From: mckee@MITRE.MITRE.ORG (H. Craig McKee)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Info on implementation details...
Message-ID: <8908221338.AA09328@mitre.arpa>
Date: 22 Aug 89 13:38:24 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The MITRE Corp., Washington, D.C.
Lines: 17

>that a "typical" TCP/IP system might correspond roughly as follows:
>
>[deleted] 
>
>	Application			user application
>
>Is there some heresy in this conceptualization?

There is, depending on your religious fervor, a small heresy:
The Application layer does not contain applications such as an editor,
spreadsheet, or matrix inversion; rather, it contains communications
routines, such as file transfer and e-mail, that may be used by 
applications.  For example, on the Ultrix system here, when the system
goes down, the editor vi uses e-mail to tell me how to recover the file 
I was working on.

Regards - Craig