FW: [Hist Trivia] IP Protocol Layers

["Polinsky, Steven" <[e-mail]>]

Dave Clark refers to the IP layer and the TCP layer in RFC817:

"The TCP layer, as well as the IP layer, performs a  demultiplexing
function ...."

He also cites: 1]  Cohen  and  Postel,  "On  Protocol  Multiplexing",  Sixth
Data Communications Symposium, ACM/IEEE, November 1979, 

Steven

Steven M. Polinsky
Goldman, Sachs & Co.
180 Maiden Lane
New York, NY 10038
212-902-3669 | Fax: [phone]


-----Original Message-----
From: Timothy J. Salo [mailto:[e-mail]] 
Sent: Tuesday, July 17, 2001 3:59 PM
To: [e-mail]
Subject: [Hist Trivia] IP Protocol Layers


Can anyone point me to an early reference describing the Internet
protocol layers in IP terms, rather than OSI terms?

One recent text used the following terms.  However, I don't know whether
this description has a long history, or is simply revisionist history.

	Application
	Transport (TCP, UDP)
	Internet (IP, etc.)
	Network Interface (LAN and WAN technologies).

By 1983 the Internet protocols were already being recast in OSI terms.
Vint Cerf, in "The DoD Internet Architecture Model", described the
following layers:

	Application
	Utility
	Transport
	Internetwork
	Network
	Link
	Physical

In May 1979, Jon Postel in IEN-94 ("Internet Protocol Handbook"; it was
small then - 1209 bytes) use the following layers:


>                        Internet Protocol Handbook
>                            Table of Contents
> 
> Gateway Level
>    Internet Datagram Protocol                                     IEN-80
>    Gateway Routing: An Implementation Specification               IEN-30
> 
> Host Level
>    User Datagram Protocol                                         IEN-88
>    Transmission Control Protocol                                  IEN-81
>    Multiplexing Protocol                                          IEN-90
> 
> Application Level
>    Name Server Protocol                                           IEN-89
>    Internet Message Protocol                                      IEN-85
> 
> Appendices
>    Protocol Options                                               IEN-92
>    Address Mappings                                               IEN-91
>    Assigned Numbers                                               IEN-93

Does anyone have a pointer to an early, more "traditional", non-OSI 
description of the TCP/IP protocol layers?

(By the way, I found the concept behind RFC 157, "Invitation to the Second
Symposium on Problems in the Optimization of Data Communications Systems",
rather interesting.  I must admit that I hadn't thought of submitting
spam as an RFC.)

Thanks,
	-tjs