AUERBACH@CSL.SRI.COM (Karl Auerbach) (06/19/87)
Since I'm sort of an ISO proponent, I guess that I can post this
without getting too much flak...
Did any of you notice the article "Practicing What It Preaches Is Aim
of Standards Group's LAN" on page C/7 (Connectivity section) of the
June 16 issue of PC Week?
For those of you who didn't, here are some excerpts:
To implement the actual seven protocol layers COS [Corporation
for Open Systems] is taking the approach it recommends to its
members. Since few products that implement upper-layer
standards are available, COS is utilizing established ISO
standards at the lower levels, with close approximations -- in
this case, the TCP/IP protocol suite -- at the top.
...
The interim approach that COS uses and recommends is the set of
protocols used by the Department of Defense on its Defense Data
Network (DDN), also called Arpanet. The DDN employs the TCP/IP
protocol suite. TCP/IP most closely resembles the ISO standard,
and is migrating toward it, Mr. Berkowitz said. For example,
the DDN internet protocol, used at layer 3 of the ISO model
(network layer) is evolving toward the ISO 8473 standard, while
the DDN transport protocol, TP 4 [sic], is moving toward the ISO
8073 standard at the transport layer.
Up at layers 5, 6, and 7, things get even more complex,
according to Mr. Berkowitz. Currently, COS is using the DDN's
FTP (file transfer protocol), which covers all of these top
layers. ...
--karl--
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