Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!elroy.jpl.nasa.gov!turnkey!orchard.la.locus.com!prodnet.la.locus.com!spear From: spear@locus.com (Brad Spear) Newsgroups: comp.sys.amiga Subject: Re: Networking (Re: Supercomputer Experiment vs Amiga) Message-ID: <18059@oolong.la.locus.com> Date: 10 Oct 90 17:57:28 GMT References: <6722@sugar.hackercorp.com> <8052@gollum.twg.com> Distribution: comp Organization: Locus Computing Corp, Los Angeles Lines: 25 In article (murfle) david@twg.com (David S. Herron) wrote: >Well.. since I happen to be in the group of people developing The Wollongong >Group's OSI software I suppose that means I know something about the >lay of this particular stretch of the swamps. > >The DoD did at one time decide that "TP4" would replace "IP" at >some future time. TP4 is one of the transport protocols in the ISO suite >and is the one which most closely matches IP (connectionless, able >to lose packets, sequenced, etc). Since you are working on OSI, I'm sure this is just a typo -- you meant to say TP0, not TP4, didn't you? TP4 is roughly equivalent to TCP, while TP0 is roughly equivalent to UDP. The intermediates, TP1 through TP3 provide intermediate service levels that don't have direct counterparts. Also, the OSI equivalent to IP is also called IP. This layer deals with network routing issues. TP0 is just a very thin layer on top of this, much as UDP is a very thin layer on top of the Internet IP. Brad -- Brad Spear Locus Computing Corporation spear@locus.com Inglewood, CA, USA Disclaimer: I speak for no one but myself. This line intentionally left blank.