Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!unmvax!gatech!udel!lap
From: lap@udel.EDU (Larry Pearlstein)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Info on implementation details...
Message-ID: <22009@louie.udel.EDU>
Date: 18 Aug 89 23:12:36 GMT
Sender: usenet@udel.EDU
Reply-To: lap@udel.EDU (Larry Pearlstein)
Distribution: usa
Organization: University of Delaware
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> At what levels (interrupt, daemon, system driver, application 
> program) are each of the seven network layers generally 
> implemented in a typical TCP/IP system.  I imagine that the 

I have received a proper scolding for using the "seven layer model"
in the same sentence with "TCP/IP".  I actually was aware that TCP/IP
did not strictly adhere to the ISO model.  Still, it has been my impression
that a "typical" TCP/IP system might correspond roughly as follows:

	Physical & data link		Ethernet
	Network				IP
	Transport			TCP
	Session				RPC
	Presentation			XDR
	Application			user application

Is there some heresy in this conceptualization?

I didn't want to spell out the RPC, XDR, ... layers in the question
in the hopes of receiving the most general responses.

Thanks for all those who responded (either by mail or on the net).  If
I get a few more mail messages, I'll summarize to the net.

                                   Larry Pearlstein
                                   lap@huey.udel.edu