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Official ARPA-Internet protocols (RFC0991)

IP.com Disclosure Number: IPCOM000004988D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2001-Jul-13
Document File: 47 page(s) / 64K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J.K. Reynolds: AUTHOR [+1]


This RFC identifies the documents specifying the official protocols used in the Internet. Comments indicate any revisions or changes planned.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group J. Reynolds Request for Comments: 991 J. Postel

ISI Obsoletes: RFCs 961, 943, 924, 901, 880, 840 November 1986



This memo is an official status report on the protocols used in the ARPA-Internet community. Distribution of this memo is unlimited.


This RFC identifies the documents specifying the official protocols used in the Internet. Comments indicate any revisions or changes planned.

To first order, the official protocols are those specified in the "DDN Protocol Handbook" (DPH), dated December 1985 (this is a three volume set with a total thickness of about 5 inches).

Older collections that include many of these specifications are the "Internet Protocol Transition Workbook" (IPTW), dated March 1982; the "Internet Mail Protocols", dated November 1982; and the "Internet Telnet Protocols and Options", dated June 1983. There is also a volume of protocol related information called the "Internet Protocol Implementers Guide" (IPIG) dated August 1982. An even older collection is the "ARPANET Protocol Handbook" (APH) dated January 1978. Nearly all the relevant material from these collections has been reproduced in the current DPH.

This document is organized as a sketchy outline. The entries are protocols (e.g., Transmission Control Protocol). In each entry there are notes on status, specification, comments, other references, dependencies, and contact.

The STATUS is one of: required, recommended, elective, experimental, or none.

The SPECIFICATION identifies the protocol defining documents.

The COMMENTS describe any differences from the specification or problems with the protocol.

The OTHER REFERENCES identify documents that comment on or expand on the protocol.

Reynolds Postel [Page 1]

RFC 991 November 1986 Official ARPA-Internet Protocols

The DEPENDENCIES indicate what other protocols are called upon by this protocol.

The CONTACT indicates a person who can answer questions about the protocol.

In particular, the status may be:


all hosts must implement the required protocol,


all hosts are encouraged to implement the recommended protocol,


hosts may implement or not the elective protocol,


hosts should not implement the experimental protocol unless they are participating in the experiment and have coordinated their use of this protocol with the contact person, and


this is not a protocol.

For further information about protocols in general, please contact:

Joyce K. Reynolds USC Information Sciences Institute 4676 Admiralty Way Marina del Rey, California 90292-6695

Phone: (213) 822-1511


Reynolds Postel [Page 2]

RFC 991 November 1986 Official ARPA-Internet Protoc...