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Path: pdn!larry
From: larry@pdn.UUCP (Larry Swift)
Newsgroups: mod.protocols
Subject: Re: OSI references & flow control
Message-ID: <665@pdn.UUCP>
Date: 2 Mar 87 16:50:14 GMT
Organization: Paradyne Corporation, Largo, Florida
Lines: 30


(In response to an email request for OSI reference material)
There's a good collection of articles and original work by Stallings, 
"Computer Communications: Architectures, Protocols, and Standards", IEEE
Computer Society Press, 1985.  (He's from MIT also, I believe.)  The OSI
Ref. Model (ISO is 7498) itself is available from the American National 
Standards Institute.  A good seminar (and the material that goes with it,
if one can find it without taking the seminar) is available from Omnicom,
Inc, Vienna, Va.  Omnicom's executive director, Hal Folts, has also
published "A Tutorial on the OSI Reference Model", 1982, which is probably
available from Omnicom.  Other compendiums are readily available in works
such as Auerbach and Datapro's Data Communications.  (I have no affiliation
with any of these people or organizations.)  As I said, there are many others.

In locating these references for you, I discover that I may be somewhat out
of date in citing OSI's Layer five (Session Control) as that "where the data 
path is finally narrowed to a single user", although I suppose it may still
be arguable.  If sessions and transport connections are indeed tied 
together in one-for-one relationships, then it would seem that Layer 4
is the upper limit of flow control mechanisms.  (This seems to me to be in
conflict with the transport layer's responsiblity for cost-effective 
conections.)


--------------------------------
Larry Swift
UUCP: {ihnp4,gatech,cbosgd}!akgua!usfvax2!pdn!larry
Snail mail: LF-207, Paradyne Corp., 8550 Ulmerton Road, Largo, FL, 33541
Phone: (813) 530-8605