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osdir-1.txt
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[ PROTOCOLS:OSDIR-1.TXT ] [ OJ, 5/86 ]
THE UNDER SECRETARY OF DEFENSE
WASHINGTON, D.C. 20301
23 December 1978
MEMORANDUM FOR SECRETARY OF THE ARMY
SECRETARY OF THE NAVY
SECRETARY OF THE AIR FORCE
CHAIRMAN, JOINT CHIEFS OF STAFF
DIRECTOR, DEFENSE ADVANCED RESEARCH PROJECTS AGENCY
DIRECTOR, DEFENSE COMMUNICATIONS AGENCY
DIRECTOR, DEFENSE INTELLIGENCE AGENCY
DIRECTOR, DEFENSE LOGISTICS AGENCY
DIRECTOR, NATIONAL SECURITY AGENCY
SUBJECT: Host-to-Host Protocols for Data Communications Networks
A number of data communications networks are operating or
under development within DoD, without adequate provisions for
interoperability. AUTODIN II is expected to become operational during
FY 1980, to provide common-user data communications service for DoD
computer systems and permit a reduction in the number of specialized
data networks. Plans are under way to incorporate within AUTODIN II
networks such as the WWMCCS Intercomputer Network (WIN), Intelligence
Data Handling System Communications (IDHSC) and the SAC Digital
Network (SACDIN), among others. Local networks such as the Community
On-Line Intelligence Network System (COINS) and certain tactical
networks must have effective AUTODIN II interfaces.
AUTODIN II will provide connectivity for a wide range of systems, but
the potential for information exchange beyond narrowly defined
communities will be limited without appropriate standards for
internet, host-to-host, terminal-to-host and other protocols. As the
need to exchange information across network boundaries increases, lack
of common protocol standards will become a formidable barrier to
interoperability. Techniques in which the protocols on one network
are translated into the protocols of another will become increasingly
unworkable as the number of protocols and networks requiring
interoperation increases.
To insure interoperability of future data networking, I am directing
the adoption of a set of DoD standard host-to-host protocols based on
the Transmission Control Protocol and Internet Protocols (TCP/IP
version 4) developed in the DARPA/DCA internetwork community. DoD
requirements for precedence, security, and community of interest
controls will be incorporated within the standard protocol set. Use
of these protocols will be mandatory for all packet-oriented data
networks where there is a potential for host-to-host connectivity
across network or subnetwork boundaries. Case-by-case exceptions will
be granted only for networks that can be shown to have no future
requirements for interoperability. Because the host-to-host protocol
being developed for AUTODIN II evolved from an early version of TCP
and is unsuitable for internetwork operation, the AUTODIN II TCP will
have to be upgraded to the standard protocol set. Recognizing that
there may be cost and schedule impacts on the AUTODIN II program, the
Defense Communications Agency should perform a cost tradeoff analysis
to determine the optimum time for this transition. DCA should provide
the results of this analysis by April 1979.
To address these and future protocol issues and promulgate appropriate
standards, I am forming an OSD Protocol Standards Working Group
chaired by the Director, Information Systems. I ask each addressee to
nominate a representative. Names should be provided by January 8 1979
to LTC Wilcox (695-3287). The first task of this group will be to
finalize details of the standard host-to-host protocol set. Draft
specifications for these protocols will be available in January 1979.
Final specifications should be distributed by April 1979 following
review by the working group and testing by DCA and DARPA. At that
time, I expect to promulgate these standards and set dates for their
adoption.
The Defense Communications Agency is designated as DoD Executive Agent
for computer communications protocols and will manage the
implementation and development and evolution of standard host-to-host
protocols, as designated by the Protocol Standards Working Group. The
DCA will forward to this office within 120 days a management plan for
carrying out this role.
Gerrald P. Dinneen
Principal Deputy