faqs.org - Internet FAQ Archives

RFC 1500 - Internet Official Protocol Standards


Or Display the document by number




Network Working Group                        Internet Architecture Board
Request for Comments: 1500                             J. Postel, Editor
Obsoletes: RFCs 1410, 1360, 1280,                            August 1993
1250, 1100, 1083, 1130, 1140, 1200
STD: 1

                  INTERNET OFFICIAL PROTOCOL STANDARDS

Status of this Memo

   This memo describes the state of standardization of protocols used in
   the Internet as determined by the Internet Architecture Board (IAB).
   Distribution of this memo is unlimited.

Table of Contents

   Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2
   1.  The Standardization Process  . . . . . . . . . . . . . . . . 2
   2.  The Request for Comments Documents . . . . . . . . . . . . . 5
   3.  Other Reference Documents  . . . . . . . . . . . . . . . . . 6
   3.1.  Assigned Numbers . . . . . . . . . . . . . . . . . . . . . 6
   3.2.  Gateway Requirements . . . . . . . . . . . . . . . . . . . 6
   3.3.  Host Requirements  . . . . . . . . . . . . . . . . . . . . 6
   3.4.  The MIL-STD Documents  . . . . . . . . . . . . . . . . . . 6
   4.  Explanation of Terms . . . . . . . . . . . . . . . . . . . . 7
   4.1.  Definitions of Protocol State (Maturity Level) . . . . . . 8
   4.1.1.  Standard Protocol  . . . . . . . . . . . . . . . . . . . 8
   4.1.2.  Draft Standard Protocol  . . . . . . . . . . . . . . . . 8
   4.1.3.  Proposed Standard Protocol . . . . . . . . . . . . . . . 9
   4.1.4.  Experimental Protocol  . . . . . . . . . . . . . . . . . 9
   4.1.5.  Informational Protocol . . . . . . . . . . . . . . . . . 9
   4.1.6.  Historic Protocol  . . . . . . . . . . . . . . . . . . . 9
   4.2.  Definitions of Protocol Status (Requirement Level) . . .   9
   4.2.1.  Required Protocol  . . . . . . . . . . . . . . . . . .   9
   4.2.2.  Recommended Protocol . . . . . . . . . . . . . . . . .   9
   4.2.3.  Elective Protocol  . . . . . . . . . . . . . . . . . .  10
   4.2.4.  Limited Use Protocol . . . . . . . . . . . . . . . . .  10
   4.2.5.  Not Recommended Protocol . . . . . . . . . . . . . . .  10
   5.  The Standards Track  . . . . . . . . . . . . . . . . . . .  10
   5.1.  The RFC Processing Decision Table  . . . . . . . . . . .  10
   5.2.  The Standards Track Diagram  . . . . . . . . . . . . . .  12
   6.  The Protocols  . . . . . . . . . . . . . . . . . . . . . .  14
   6.1.  Recent Changes . . . . . . . . . . . . . . . . . . . . .  14
   6.1.1.  New RFCs . . . . . . . . . . . . . . . . . . . . . . .  14
   6.1.2.  Other Changes  . . . . . . . . . . . . . . . . . . . .  20
   6.2.  Standard Protocols . . . . . . . . . . . . . . . . . . .  22

   6.3.  Network-Specific Standard Protocols  . . . . . . . . . .  24
   6.4.  Draft Standard Protocols . . . . . . . . . . . . . . . .  25
   6.5.  Proposed Standard Protocols  . . . . . . . . . . . . . .  26
   6.6.  Telnet Options . . . . . . . . . . . . . . . . . . . . .  28
   6.7.  Experimental Protocols . . . . . . . . . . . . . . . . .  29
   6.8.  Informational Protocols  . . . . . . . . . . . . . . . .  30
   6.9.  Historic Protocols . . . . . . . . . . . . . . . . . . .  31
   7.  Contacts . . . . . . . . . . . . . . . . . . . . . . . . .  32
   7.1.  IAB, IETF, and IRTF Contacts . . . . . . . . . . . . . .  32
   7.1.1.  Internet Architecture Board (IAB) Contact  . . . . . .  32
   7.1.2.  Internet Engineering Task Force (IETF) Contact . . . .  33
   7.1.3.  Internet Research Task Force (IRTF) Contact  . . . . .  34
   7.2.  Internet Assigned Numbers Authority (IANA) Contact . . .  34
   7.3.  Request for Comments Editor Contact  . . . . . . . . . .  35
   7.4.  Network Information Center Contact . . . . . . . . . . .  35
   7.5.  Sources for Requests for Comments  . . . . . . . . . . .  36
   8.  Security Considerations  . . . . . . . . . . . . . . . . .  36
   9.  Author's Address . . . . . . . . . . . . . . . . . . . . .  36

Introduction

   A discussion of the standardization process and the RFC document
   series is presented first, followed by an explanation of the terms.
   Sections 6.2 - 6.9 contain the lists of protocols in each stage of
   standardization.  Finally are pointers to references and contacts for
   further information.

   This memo is intended to be issued approximately quarterly; please be
   sure the copy you are reading is current.  Current copies may be
   obtained from the Network Information Center (INTERNIC) or from the
   Internet Assigned Numbers Authority (IANA) (see the contact
   information at the end of this memo).  Do not use this edition after
   31-October-93.

   See Section 6.1 for a description of recent changes.  In the official
   lists in sections 6.2 - 6.9, an asterisk (*) next to a protocol
   denotes that it is new to this document or has been moved from one
   protocol level to another, or differs from the previous edition of
   this document.

1.  The Standardization Process

   The Internet Architecture Board maintains this list of documents that
   define standards for the Internet protocol suite.  See RFC-1358 for
   the charter of the IAB and RFC-1160 for an explanation of the role
   and organization of the IAB and its subsidiary groups, the Internet
   Engineering Task Force (IETF) and the Internet Research Task Force
   (IRTF).  Each of these groups has a steering group called the IESG

   and IRSG, respectively.  The IETF develops these standards with the
   goal of co-ordinating the evolution of the Internet protocols; this
   co-ordination has become quite important as the Internet protocols
   are increasingly in general commercial use.  The definitive
   description of the Internet standards process is found in RFC-1310.

   The majority of Internet protocol development and standardization
   activity takes place in the working groups of the IETF.

   Protocols which are to become standards in the Internet go through a
   series of states or maturity levels (proposed standard, draft
   standard, and standard) involving increasing amounts of scrutiny and
   testing.  When a protocol completes this process it is assigned a STD
   number (see RFC-1311).  At each step, the Internet Engineering
   Steering Group (IESG) of the IETF must make a recommendation for
   advancement of the protocol.

   To allow time for the Internet community to consider and react to
   standardization proposals, a minimum delay of 6 months before a
   proposed standard can be advanced to a draft standard and 4 months
   before a draft standard can be promoted to standard.

   It is general practice that no proposed standard can be promoted to
   draft standard without at least two independent implementations (and
   the recommendation of the IESG).  Promotion from draft standard to
   standard generally requires operational experience and demonstrated
   interoperability of two or more implementations (and the
   recommendation of the IESG).

   In cases where there is uncertainty as to the proper decision
   concerning a protocol a special review committee may be appointed
   consisting of experts from the IETF, IRTF and the IAB with the
   purpose of recommending an explicit action.

   Advancement of a protocol to proposed standard is an important step
   since it marks a protocol as a candidate for eventual standardization
   (it puts the protocol "on the standards track").  Advancement to
   draft standard is a major step which warns the community that, unless
   major objections are raised or flaws are discovered, the protocol is
   likely to be advanced to standard in six months.

   Some protocols have been superseded by better ones or are otherwise
   unused.  Such protocols are still documented in this memorandum with
   the designation "historic".

   Because it is useful to document the results of early protocol
   research and development work, some of the RFCs document protocols
   which are still in an experimental condition.  The protocols are

   designated "experimental" in this memorandum.  They appear in this
   report as a convenience to the community and not as evidence of their
   standardization.

   Other protocols, such as those developed by other standards
   organizations, or by particular vendors, may be of interest or may be
   recommended for use in the Internet.  The specifications of such
   protocols may be published as RFCs for the convenience of the
   Internet community.  These protocols are labeled "informational" in
   this memorandum.

   In addition to the working groups of the IETF, protocol development
   and experimentation may take place as a result of the work of the
   research groups of the Internet Research Task Force, or the work of
   other individuals interested in Internet protocol development.  The
   the documentation of such experimental work in the RFC series is
   encouraged, but none of this work is considered to be on the track
   for standardization until the IESG has made a recommendation to
   advance the protocol to the proposed standard state.

   A few protocols have achieved widespread implementation without the
   approval of the IESG.  For example, some vendor protocols have become
   very important to the Internet community even though they have not
   been recommended by the IESG.  However, the IAB strongly recommends
   that the standards process be used in the evolution of the protocol
   suite to maximize interoperability (and to prevent incompatible
   protocol requirements from arising).  The use of the terms
   "standard", "draft standard", and "proposed standard" are reserved in
   any RFC or other publication of Internet protocols to only those
   protocols which the IESG has approved.

   In addition to a state (like "Proposed Standard"), a protocol is also
   assigned a status, or requirement level, in this document.  The
   possible requirement levels ("Required", "Recommended", "Elective",
   "Limited Use", and "Not Recommended") are defined in Section 4.2.
   When a protocol is on the standards track, that is in the proposed
   standard, draft standard, or standard state (see Section 5), the
   status shown in Section 6 is the current status.

   Few protocols are required to be implemented in all systems; this is
   because there is such a variety of possible systems, for example,
   gateways, routers, terminal servers, workstations, and multi-user
   hosts.  The requirement level shown in this document is only a one
   word label, which may not be sufficient to characterize the
   implementation requirements for a protocol in all situations.  For
   some protocols, this document contains an additional status paragraph
   (an applicability statement).  In addition, more detailed status
   information may be contained in separate requirements documents (see

   Section 3).

2.  The Request for Comments Documents

   The documents called Request for Comments (or RFCs) are the working
   notes of the "Network Working Group", that is the Internet research
   and development community.  A document in this series may be on
   essentially any topic related to computer communication, and may be
   anything from a meeting report to the specification of a standard.

   Notice:

      All standards are published as RFCs, but not all RFCs specify
      standards.

   Anyone can submit a document for publication as an RFC.  Submissions
   must be made via electronic mail to the RFC Editor (see the contact
   information at the end of this memo, and see RFC 1111).

   While RFCs are not refereed publications, they do receive technical
   review from the task forces, individual technical experts, or the RFC
   Editor, as appropriate.

   The RFC series comprises a wide range of documents, ranging from
   informational documents of general interests to specifications of
   standard Internet protocols.  In cases where submission is intended
   to document a proposed standard, draft standard, or standard
   protocol, the RFC Editor will publish the document only with the
   approval of the IESG.  For documents describing experimental work,
   the RFC Editor will notify the IESG before publication, allowing for
   the possibility of review by the relevant IETF working group or IRTF
   research group and provide those comments to the author.  See Section
   5.1 for more detail.

   Once a document is assigned an RFC number and published, that RFC is
   never revised or re-issued with the same number.  There is never a
   question of having the most recent version of a particular RFC.
   However, a protocol (such as File Transfer Protocol (FTP)) may be
   improved and re-documented many times in several different RFCs.  It
   is important to verify that you have the most recent RFC on a
   particular protocol.  This "Internet Official Protocol Standards"
   memo is the reference for determining the correct RFC for the current
   specification of each protocol.

   The RFCs are available from the INTERNIC, and a number of other
   sites.  For more information about obtaining RFCs, see Sections 7.4
   and 7.5.

3.  Other Reference Documents

   There are three other reference documents of interest in checking the
   current status of protocol specifications and standardization.  These
   are the Assigned Numbers, the Gateway Requirements, and the Host
   Requirements.  Note that these documents are revised and updated at
   different times; in case of differences between these documents, the
   most recent must prevail.

   Also, one should be aware of the MIL-STD publications on IP, TCP,
   Telnet, FTP, and SMTP.  These are described in Section 3.4.

3.1.  Assigned Numbers

   The "Assigned Numbers" document lists the assigned values of the
   parameters used in the various protocols.  For example, IP protocol
   codes, TCP port numbers, Telnet Option Codes, ARP hardware types, and
   Terminal Type names.  Assigned Numbers was most recently issued as
   RFC-1340.

3.2.  Gateway Requirements

   This document reviews the specifications that apply to gateways and
   supplies guidance and clarification for any ambiguities.  Gateway
   Requirements is RFC-1009.  A working group of the IETF is actively
   preparing a revision.

3.3.  Host Requirements

   This pair of documents reviews and updates the specifications that
   apply to hosts, and it supplies guidance and clarification for any
   ambiguities.  Host Requirements was issued as RFC-1122 and RFC-1123.

3.4.  The MIL-STD Documents

   The Internet community specifications for IP (RFC-791) and TCP (RFC-
   793) and the DoD MIL-STD specifications are intended to describe
   exactly the same protocols.  Any difference in the protocols
   specified by these sets of documents should be reported to DISA and
   to the IESG.  The RFCs and the MIL-STDs for IP and TCP differ in
   style and level of detail.  It is strongly advised that the two sets
   of documents be used together, along with RFC-1122 and RFC-1123.

   The Internet and the DoD MIL-STD specifications for the FTP, SMTP,
   and Telnet protocols are essentially the same documents (RFCs 765,
   821, 854).  The MIL-STD versions have been edited slightly.  Note
   that the current Internet specification for FTP is RFC-959 (as
   modified by RFC-1123).

   Note that these MIL-STD are now somewhat out of date.  The Gateway
   Requirements (RFC-1009) and Host Requirements (RFC-1122, RFC-1123)
   take precedence over both earlier RFCs and the MIL-STDs.

          Internet Protocol (IP)                      MIL-STD-1777
          Transmission Control Protocol (TCP)         MIL-STD-1778
          File Transfer Protocol (FTP)                MIL-STD-1780
          Simple Mail Transfer Protocol (SMTP)        MIL-STD-1781
          Telnet Protocol and Options (TELNET)        MIL-STD-1782

   These documents are available from the Naval Publications and Forms
   Center.  Requests can be initiated by telephone, telegraph, or mail;
   however, it is preferred that private industry use form DD1425, if
   possible.

          Naval Publications and Forms Center, Code 3015
          5801 Tabor Ave
          Philadelphia, PA 19120
          Phone: 1-215-697-3321 (order tape)
                 1-215-697-4834 (conversation)

4.  Explanation of Terms

   There are two independent categorization of protocols.  The first is
   the "maturity level" or STATE of standardization, one of "standard",
   "draft standard", "proposed standard", "experimental",
   "informational" or "historic".  The second is the "requirement level"
   or STATUS of this protocol, one of "required", "recommended",
   "elective", "limited use", or "not recommended".

   The status or requirement level is difficult to portray in a one word
   label.  These status labels should be considered only as an
   indication, and a further description, or applicability statement,
   should be consulted.

   When a protocol is advanced to proposed standard or draft standard,
   it is labeled with a current status.

   At any given time a protocol occupies a cell of the following matrix.
   Protocols are likely to be in cells in about the following
   proportions (indicated by the relative number of Xs).  A new protocol
   is most likely to start in the (proposed standard, elective) cell, or
   the (experimental, not recommended) cell.

                             S T A T U S
                     Req   Rec   Ele   Lim   Not
                   +-----+-----+-----+-----+-----+
           Std     |  X  | XXX | XXX |     |     |
       S           +-----+-----+-----+-----+-----+
           Draft   |  X  |  X  | XXX |     |     |
       T           +-----+-----+-----+-----+-----+
           Prop    |     |  X  | XXX |     |     |
       A           +-----+-----+-----+-----+-----+
           Info    |     |     |     |     |     |
       T           +-----+-----+-----+-----+-----+
           Expr    |     |     |     | XXX |     |
       E           +-----+-----+-----+-----+-----+
           Hist    |     |     |     |     | XXX |
                   +-----+-----+-----+-----+-----+

   What is a "system"?

      Some protocols are particular to hosts and some to gateways; a few
      protocols are used in both.  The definitions of the terms below
      will refer to a "system" which is either a host or a gateway (or
      both).  It should be clear from the context of the particular
      protocol which types of systems are intended.

4.1.  Definitions of Protocol State

   Every protocol listed in this document is assigned to a "maturity
   level" or STATE of standardization: "standard", "draft standard",
   "proposed standard", "experimental", or "historic".

   4.1.1.  Standard Protocol

      The IESG has established this as an official standard protocol for
      the Internet.  These protocols are assigned STD numbers (see RFC-
      1311).  These are separated into two groups: (1) IP protocol and
      above, protocols that apply to the whole Internet; and (2)
      network-specific protocols, generally specifications of how to do
      IP on particular types of networks.

   4.1.2.  Draft Standard Protocol

      The IESG is actively considering this protocol as a possible
      Standard Protocol.  Substantial and widespread testing and comment
      are desired.  Comments and test results should be submitted to the
      IESG.  There is a possibility that changes will be made in a Draft
      Standard Protocol before it becomes a Standard Protocol.

   4.1.3.  Proposed Standard Protocol

      These are protocol proposals that may be considered by the IESG
      for standardization in the future.  Implementation and testing by
      several groups is desirable.  Revision of the protocol
      specification is likely.

   4.1.4.  Experimental Protocol

      A system should not implement an experimental protocol unless it
      is participating in the experiment and has coordinated its use of
      the protocol with the developer of the protocol.

      Typically, experimental protocols are those that are developed as
      part of an ongoing research project not related to an operational
      service offering.  While they may be proposed as a service
      protocol at a later stage, and thus become proposed standard,
      draft standard, and then standard protocols, the designation of a
      protocol as experimental may sometimes be meant to suggest that
      the protocol, although perhaps mature, is not intended for
      operational use.

   4.1.5.  Informational Protocol

      Protocols developed by other standard organizations, or vendors,
      or that are for other reasons outside the purview of the IESG, may
      be published as RFCs for the convenience of the Internet community
      as informational protocols.

   4.1.6.  Historic Protocol

      These are protocols that are unlikely to ever become standards in
      the Internet either because they have been superseded by later
      developments or due to lack of interest.

4.2.  Definitions of Protocol Status

      This document lists a "requirement level" or STATUS for each
      protocol.  The status is one of "required", "recommended",
      "elective", "limited use", or "not recommended".

   4.2.1.  Required Protocol

      A system must implement the required protocols.

   4.2.2.  Recommended Protocol

      A system should implement the recommended protocols.

   4.2.3.  Elective Protocol

      A system may or may not implement an elective protocol. The
      general notion is that if you are going to do something like this,
      you must do exactly this.  There may be several elective protocols
      in a general area, for example, there are several electronic mail
      protocols, and several routing protocols.

   4.2.4.  Limited Use Protocol

      These protocols are for use in limited circumstances.  This may be
      because of their experimental state, specialized nature, limited
      functionality, or historic state.

   4.2.5.  Not Recommended Protocol

      These protocols are not recommended for general use.  This may be
      because of their limited functionality, specialized nature, or
      experimental or historic state.

5.  The Standards Track

   This section discusses in more detail the procedures used by the RFC
   Editor and the IESG in making decisions about the labeling and
   publishing of protocols as standards.

5.1.  The RFC Processing Decision Table

   Here is the current decision table for processing submissions by the
   RFC Editor.  The processing depends on who submitted it, and the
   status they want it to have.

      +==========================================================+
      |**************|               S O U R C E                 |
      +==========================================================+
      | Desired      |    IAB   |   IESG   |   IRSG   |  Other   |
      | Status       |          |          |          |          |
      +==========================================================+
      |              |          |          |          |          |
      | Standard     |  Bogus   |  Publish |  Bogus   |  Bogus   |
      | or           |   (2)    |   (1)    |   (2)    |   (2)    |
      | Draft        |          |          |          |          |
      | Standard     |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      |              |  Refer   |  Publish |  Refer   |  Refer   |
      | Proposed     |   (3)    |   (1)    |   (3)    |   (3)    |
      | Standard     |          |          |          |          |
      |              |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      |              |  Notify  |  Publish |  Notify  |  Notify  |
      | Experimental |   (4)    |   (1)    |   (4)    |   (4)    |
      | Protocol     |          |          |          |          |
      |              |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      | Information  |  Publish |  Publish |Discretion|Discretion|
      | or Opinion   |   (1)    |   (1)    |   (5)    |   (5)    |
      | Paper        |          |          |          |          |
      |              |          |          |          |          |
      +==========================================================+

      (1) Publish.

      (2) Bogus.  Inform the source of the rules.  RFCs specifying
          Standard, or Draft Standard must come from the IESG, only.

      (3) Refer to an Area Director for review by a WG.  Expect to see
          the document again only after approval by the IESG.

      (4) Notify both the IESG and IRSG.  If no concerns are raised in
          two weeks then do Discretion (5), else RFC Editor to resolve
          the concerns or do Refer (3).

      (5) RFC Editor's discretion.  The RFC Editor decides if a review
          is needed and if so by whom.  RFC Editor decides to publish or
          not.

   Of course, in all cases the RFC Editor can request or make minor

   changes for style, format, and presentation purposes.

   The IESG has designated the IESG Secretary as its agent for
   forwarding documents with IESG approval and for registering concerns
   in response to notifications (4) to the RFC Editor.  Documents from
   Area Directors or Working Group Chairs may be considered in the same
   way as documents from "other".

5.2.  The Standards Track Diagram

   There is a part of the STATUS and STATE categorization that is called
   the standards track.  Actually, only the changes of state are
   significant to the progression along the standards track, though the
   status assignments may change as well.

   The states illustrated by single line boxes are temporary states,
   those illustrated by double line boxes are long term states.  A
   protocol will normally be expected to remain in a temporary state for
   several months (minimum six months for proposed standard, minimum
   four months for draft standard).  A protocol may be in a long term
   state for many years.

   A protocol may enter the standards track only on the recommendation
   of the IESG; and may move from one state to another along the track
   only on the recommendation of the IESG.  That is, it takes action by
   the IESG to either start a protocol on the track or to move it along.

   Generally, as the protocol enters the standards track a decision is
   made as to the eventual STATUS, requirement level or applicability
   (elective, recommended, or required) the protocol will have, although
   a somewhat less stringent current status may be assigned, and it then
   is placed in the the proposed standard STATE with that status.  So
   the initial placement of a protocol is into state 1.  At any time the
   STATUS decision may be revisited.

         |
         +<----------------------------------------------+
         |                                               ^
         V    0                                          |    4
   +-----------+                                   +===========+
   |   enter   |-->----------------+-------------->|experiment |
   +-----------+                   |               +=====+=====+
                                   |                     |
                                   V    1                |
                             +-----------+               V
                             | proposed  |-------------->+
                        +--->+-----+-----+               |
                        |          |                     |
                        |          V    2                |
                        +<---+-----+-----+               V
                             | draft std |-------------->+
                        +--->+-----+-----+               |
                        |          |                     |
                        |          V    3                |
                        +<---+=====+=====+               V
                             | standard  |-------------->+
                             +=====+=====+               |
                                                         |
                                                         V    5
                                                   +=====+=====+
                                                   | historic  |
                                                   +===========+

   The transition from proposed standard (1) to draft standard (2) can
   only be by action of the IESG and only after the protocol has been
   proposed standard (1) for at least six months.

   The transition from draft standard (2) to standard (3) can only be by
   action of the IESG and only after the protocol has been draft
   standard (2) for at least four months.

   Occasionally, the decision may be that the protocol is not ready for
   standardization and will be assigned to the experimental state (4).
   This is off the standards track, and the protocol may be resubmitted
   to enter the standards track after further work.  There are other
   paths into the experimental and historic states that do not involve
   IESG action.

   Sometimes one protocol is replaced by another and thus becomes
   historic, or it may happen that a protocol on the standards track is
   in a sense overtaken by another protocol (or other events) and
   becomes historic (state 5).

6.  The Protocols

   Subsection 6.1 lists recent RFCs and other changes.  Subsections 6.2
   - 6.9 list the standards in groups by protocol state.

6.1.  Recent Changes

6.1.1.  New RFCs:

      1501 - OS/2 User Group

             This is an information document and does not specify any
             level of standard.

      1500 - This memo.

      1499 - Not yet issued.

      1498 - On the Naming and Binding of Network Destinations

             This is an information document and does not specify any
             level of standard.

      1497 - BOOTP Vendor Information Extensions

             This memo is a status report on BOOTP types and is a part
             of the BOOTP specification which is currently a Draft
             Standard.

      1496 - Rules for Downgrading Messages from X.400/88 to X.400/84
             When MIME Content-Types are Present in the Messages

             A Proposed Standard protocol.

      1495 - Mapping between X.400 and RFC-822 Message Bodies

             A Proposed Standard protocol.

      1494 - Equivalences between 1988 X.400 and RFC-822 Message Bodies

             A Proposed Standard protocol.

      1493 - Definitions of Managed Objects for Bridges

             A Draft Standard protocol.

      1492 - An Access Control Protocol, Sometimes Called TACACS

             This is an information document and does not specify any
             level of standard.

      1491 - A Survey of Advanced Usages of X.500

             This is an information document and does not specify any
             level of standard.

      1490 - Multiprotocol Interconnect over Frame Relay

             A Draft Standard protocol.

      1489 - Registration of a Cyrillic Character Set

             This document defines a character set, and is referenced by
             "Assigned Numbers" (STD 2).

      1488 - The X.500 String Representation of Standard
             Attribute Syntaxes

             A Proposed Standard protocol.

      1487 - X.500 Lightweight Directory Access Protocol

             A Proposed Standard protocol.

      1486 - An Experiment in Remote Printing

             An Experimental protocol.

      1485 - A String Representation of Distinguished Names (OSI-DS 23
             (v5))

             A Proposed Standard protocol.

      1484 - Using the OSI Directory to achieve User Friendly
             Naming (OSI-DS 24 (v1.2))

             An Experimental protocol.

      1483 - Multiprotocol Encapsulation over ATM Adaptation Layer 5

             A Proposed Standard protocol.

      1482 - Aggregation Support in the NSFNET Policy-Based Routing
             Database

             This is an information document and does not specify any
             level of standard.

      1481 - IAB Recommendation for an Intermediate Strategy to Address
             the Issue of Scaling

             This is an information document and does not specify any
             level of standard.

      1480 - The US Domain

             This is an information document and does not specify any
             level of standard.

      1479 - Inter-Domain Policy Routing Protocol Specification:
             Version-1

             A Proposed Standard protocol.

      1478 - An Architecture for Inter-Domain Policy Routing

             A Proposed Standard protocol.

      1477 - IDPR as a Proposed Standard

             This is an information document and does not specify any
             level of standard.

      1476 - RAP: Internet Route Access Protocol

             An Experimental protocol.

      1475 - TP/IX: The Next Internet

             An Experimental protocol.

      1474 - The Definitions of Managed Objects for the Bridge Network
             Control Protocol of the Point-to-Point Protocol

             A Proposed Standard protocol.

      1473 - The Definitions of Managed Objects for the IP Network
             Control Protocol of the Point-to-Point Protocol

             A Proposed Standard protocol.

      1472 - The Definitions of Managed Objects for the Security
             Protocols of the Point-to-Point Protocol

             A Proposed Standard protocol.

      1471 - The Definitions of Managed Objects for the Link Control
             Protocol of the Point-to-Point Protocol

             A Proposed Standard protocol.

      1470 - FYI on a Network Management Tool Catalog: Tools for
             Monitoring and Debugging TCP/IP Internets and
             Interconnected Devices

             This is an information document and does not specify any
             level of standard.

      1469 - IP Multicast over Token-Ring Local Area Networks

             A Proposed Standard protocol.

      1468 - Japanese Character Encoding for Internet Messages

             This document defines a character set, and is referenced by
             "Assigned Numbers" (STD 2).

      1467 - Status of CIDR Deployment in the Internet

             This is an information document and does not specify any
             level of standard.

      1466 - Guidelines for Management of IP Address Space

             This is an information document and does not specify any
             level of standard.

      1465 - Routing Coordination for X.400 MHS Services Within a Multi
             Protocol / Multi Network Environment Table Format V3 for
             Static Routing

             An Experimental protocol.

      1464 - Using the Domain Name System To Store Arbitrary String
             Attributes

             An Experimental protocol.

      1463 - FYI on Introducing the Internet-- A Short Bibliography of
             Introductory Internetworking Readings

             This is an information document and does not specify any
             level of standard.

      1462 - FYI on "What is the Internet?"

             This is an information document and does not specify any
             level of standard.

      1461 - SNMP MIB extension for Multiprotocol Interconnect over X.25

             A Proposed Standard protocol.

      1460 - Post Office Protocol - Version-3

             A Draft Standard protocol.

      1459 - Internet Relay Chat Protocol

             An Experimental protocol.

      1458 - Requirements for Multicast Protocols

             This is an information document and does not specify any
             level of standard.

      1457 - Security Label Framework for the Internet

             This is an information document and does not specify any
             level of standard.

      1456 - Conventions for Encoding the Vietnamese Language - VISCII:
             VIetnamese Standard Code for Information Interchange  -
             VIQR: VIetnamese Quoted-Readable Specification

             This document defines a character set, and is referenced by
             "Assigned Numbers" (STD 2).

      1455 - Physical Link Security Type of Service

             An Experimental protocol.

      1454 - Comparison of Proposals for Next Version of IP

             This is an information document and does not specify any
             level of standard.

      1453 - A Comment on Packet Video Remote Conferencing and the
             Transport/Network Layers

             This is an information document and does not specify any
             level of standard.

      1452 - Coexistence between version-1 and version-2 of the
             Internet-standard Network Management Framework

             A Proposed Standard protocol.

      1451 - Manager-to-Manager Management Information Base

             A Proposed Standard protocol.

      1450 - Management Information Base for version-2 of the Simple
             Network Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1449 - Transport Mappings for version-2 of the Simple Network
             Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1448 - Protocol Operations for version-2 of the Simple Network
             Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1447 - Party MIB for version-2 of the Simple Network Management
             Protocol (SNMPv2)

             A Proposed Standard protocol.

      1446 - Security Protocols for version-2 of the Simple Network
             Management Protocol (SNMPv2

             A Proposed Standard protocol.

      1445 - Administrative Model for version-2 of the Simple Network
             Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1444 - Conformance Statements for version-2 of the Simple Network
             Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1443 - Textual Conventions for version-2 of the Simple Network
             Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1442 - Structure of Management Information for version-2 of the
             Simple Network Management Protocol (SNMPv2)

             A Proposed Standard protocol.

      1441 - Introduction to version-2 of the Internet-standard Network
             Management Framework

             A Proposed Standard protocol.

      1440 - SIFT/UFT: Sender-Initiated/Unsolicited File Transfer

             An Experimental protocol.

      1439 - The Uniqueness of Unique Identifiers

             This is an information document and does not specify any
             level of standard.

      1438 - Internet Engineering Task Force Statements Of Boredom
             (SOBs)

             This is an information document and does not specify any
             level of standard.

      1437 - The Extension of MIME Content-Types to a New Medium

             This is an information document and does not specify any
             level of standard.

6.1.2.  Other Changes:

   The following are changes to protocols listed in the previous
   edition.

      1298 - SNMP over IPX

             Obsoleted by 1420.

      1284 - Definitions of Managed Objects for the Ethernet-like
             Interface Types

             Moved to Historic.

      1283 - SNMP over OSI

             Obsoleted by 1418.

      1214 - "OSI Internet Management: Management Information Base

             Moved to Historic.

      1203 - Interactive Mail Access Protocol - Version-3

             Moved to Historic.

      1201 - Transmitting IP Traffic over ARCNET Networks

             Moved to Historic.

      1094 - NFS: Network File System Protocol Specification

             Moved to Informational.

      1057 - RPC: Remote Procedure Call Protocol Specification Version-2

             Moved to Informational.

      RFC 1050 - RPC: Remote Procedure Call Protocol Specification

             Moved to Historic.

6.2.  Standard Protocols

Protocol   Name                                      Status    RFC STD *
========   =====================================     ======== ==== === =
--------   Internet Official Protocol Standards      Req      1500   1
--------   Assigned Numbers                          Req      1340   2
--------   Host Requirements - Communications        Req      1122   3
--------   Host Requirements - Applications          Req      1123   3
--------   Gateway Requirements                      Req      1009   4
IP         Internet Protocol                         Req       791   5
            as amended by:--------
--------     IP Subnet Extension                     Req       950   5
--------     IP Broadcast Datagrams                  Req       919   5
--------     IP Broadcast Datagrams with Subnets     Req       922   5
ICMP       Internet Control Message Protocol         Req       792   5
IGMP       Internet Group Multicast Protocol         Rec      1112   5
UDP        User Datagram Protocol                    Rec       768   6
TCP        Transmission Control Protocol             Rec       793   7
TELNET     Telnet Protocol                           Rec   854,855   8
FTP        File Transfer Protocol                    Rec       959   9
SMTP       Simple Mail Transfer Protocol             Rec       821  10
MAIL       Format of Electronic Mail Messages        Rec       822  11
CONTENT    Content Type Header Field                 Rec      1049  11
NTPV2      Network Time Protocol (Version 2)         Rec      1119  12
DOMAIN     Domain Name System                        Rec 1034,1035  13
DNS-MX     Mail Routing and the Domain System        Rec       974  14
SNMP       Simple Network Management Protocol        Rec      1157  15
SMI        Structure of Management Information       Rec      1155  16
Concise-MIB Concise MIB Definitions                  Rec      1212  16
MIB-II     Management Information Base-II            Rec      1213  17
EGP        Exterior Gateway Protocol                 Rec       904  18
NETBIOS    NetBIOS Service Protocols                 Ele 1001,1002  19
ECHO       Echo Protocol                             Rec       862  20
DISCARD    Discard Protocol                          Ele       863  21
CHARGEN    Character Generator Protocol              Ele       864  22
QUOTE      Quote of the Day Protocol                 Ele       865  23
USERS      Active Users Protocol                     Ele       866  24
DAYTIME    Daytime Protocol                          Ele       867  25
TIME       Time Server Protocol                      Ele       868  26
TFTP       Trivial File Transfer Protocol            Ele      1350  33
RIP        Routing Information Protocol              Ele      1058  34
TP-TCP     ISO Transport Service on top of the TCP   Ele      1006  35

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   IGMP -- The Internet Architecture Board intends to move towards
   general adoption of IP multicasting, as a more efficient solution
   than broadcasting for many applications.  The host interface has been
   standardized in RFC-1112; however, multicast-routing gateways are in
   the experimental stage and are not widely available.  An Internet
   host should support all of RFC-1112, except for the IGMP protocol
   itself which is optional; see RFC-1122 for more details.  Even
   without IGMP, implementation of RFC-1112 will provide an important
   advance: IP-layer access to local network multicast addressing.  It
   is expected that IGMP will become recommended for all hosts and
   gateways at some future date.

   SMI, MIB-II SNMP -- The Internet Architecture Board recommends that
   all IP and TCP implementations be network manageable.  At the current
   time, this implies implementation of the Internet MIB-II (RFC-1213),
   and at least the recommended management protocol SNMP (RFC-1157).

   RIP -- The Routing Information Protocol (RIP) is widely implemented
   and used in the Internet.  However, both implementors and users
   should be aware that RIP has some serious technical limitations as a
   routing protocol.  The IETF is currently developing several
   candidates for a new standard "open" routing protocol with better
   properties than RIP.  The IAB urges the Internet community to track
   these developments, and to implement the new protocol when it is
   standardized; improved Internet service will result for many users.

   TP-TCP -- As OSI protocols become more widely implemented and used,
   there will be an increasing need to support interoperation with the
   TCP/IP protocols.  The Internet Engineering Task Force is formulating
   strategies for interoperation.  RFC-1006 provides one interoperation
   mode, in which TCP/IP is used to emulate TP0 in order to support OSI
   applications.  Hosts that wish to run OSI connection-oriented
   applications in this mode should use the procedure described in RFC-
   1006.  In the future, the IAB expects that a major portion of the
   Internet will support both TCP/IP and OSI (inter-)network protocols
   in parallel, and it will then be possible to run OSI applications
   across the Internet using full OSI protocol "stacks".

6.3.  Network-Specific Standard Protocols

All Network-Specific Standards have Elective status.

Protocol   Name                                    State    RFC   STD *
========   =====================================   =====   =====  === =
IP-FDDI    Transmission of IP and ARP over FDDI Net Std    1390    36
IP-HIPPI   IP and ARP on HIPPI                      Prop   1374
IP-X.25    X.25 and ISDN in the Packet Mode         Prop   1356
IP-SMDS    IP Datagrams over the SMDS Service       Prop   1209
ARP        Address Resolution Protocol              Std     826    37
RARP       A Reverse Address Resolution Protocol    Std     903    38
IP-ARPA    Internet Protocol on ARPANET             Std BBN1822    39
IP-WB      Internet Protocol on Wideband Network    Std     907    40
IP-E       Internet Protocol on Ethernet Networks   Std     894    41
IP-EE      Internet Protocol on Exp. Ethernet Nets  Std     895    42
IP-IEEE    Internet Protocol on IEEE 802            Std    1042    43
IP-DC      Internet Protocol on DC Networks         Std     891    44
IP-HC      Internet Protocol on Hyperchannel        Std    1044    45
IP-ARC     Internet Protocol on ARCNET              Std    1051    46
IP-SLIP    Transmission of IP over Serial Lines     Std    1055    47
IP-NETBIOS Transmission of IP over NETBIOS          Std    1088    48
IP-IPX     Transmission of 802.2 over IPX Networks  Std    1132    49

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   It is expected that a system will support one or more physical
   networks and for each physical network supported the appropriate
   protocols from the above list must be supported.  That is, it is
   elective to support any particular type of physical network, and for
   the physical networks actually supported it is required that they be
   supported exactly according to the protocols in the above list.  See
   also the Host and Gateway Requirements RFCs for more specific
   information on network-specific ("link layer") protocols.

6.4.  Draft Standard Protocols

Protocol   Name                                     Status          RFC
========   =====================================    ============== =====
BRIDGE-MIB BRIDGE-MIB                               Elective       1493*
IP-FR      Multiprotocol over Frame Relay           Prop           1490*
ETHER-MIB  Ethernet MIB                             Elective       1398
NTPV3      Network Time Protocol (Version 3)        Elective       1305
IP-MTU     Path MTU Discovery                       Elective       1191
FINGER     Finger Protocol                          Elective       1288
BGP3       Border Gateway Protocol 3 (BGP-3)        Elective  1267,1268
OSPF2      Open Shortest Path First Routing V2      Elective       1247
POP3       Post Office Protocol, Version 3          Elective       1460*
IP-FDDI    Internet Protocol on FDDI Networks       Elective       1188
PPP        Point to Point Protocol                  Elective       1171
BOOTP      Bootstrap Protocol                      Recommended 951,1497*
NICNAME    WhoIs Protocol                           Elective        954

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   PPP -- Point to Point Protocol is a method of sending IP over serial
   lines, which are a type of physical network.  It is anticipated that
   PPP will be advanced to the network-specifics standard protocol state
   in the future.

6.5.  Proposed Standard Protocols

Protocol   Name                                     Status          RFC
========   =====================================    ============== =====
HARPOON    Rules for Downgrading Messages...        Elective       1496*
Mapping    MHS/RFC-822 Message Body Mapping         Elective       1495*
Equiv      X.400/MIME Body Equivalences             Elective       1494*
X.500syn   X.500 String Representation ...          Elective       1488*
X.500lite  X.500 Lightweight ...                    Elective       1487*
STR-REP    String Representation ...                Elective       1485*
OSI-Dir    OSI User Friendly Naming ...             Elective       1484*
ATM-ENCAP  Multiprotocol Encapsulation over ATM     Elective       1483*
IDPR       Inter-Domain Policy Routing Protocol     Elective       1479*
IDPR-ARCH  Architecture for IDPR                    Elective       1478*
PPP/Bridge MIB Bridge PPP MIB                       Elective       1474*
PPP/IP MIB  IP Network Control Protocol of PPP MIB  Elective       1473*
PPP/SEC MIB Security Protocols of PPP MIB           Elective       1472*
PPP/LCP MIB Link Control Protocol of PPP MIB        Elective       1471*
IP-TR-MC   IP Multicast over Token-Ring LANs        Elective       1469*
X25-MIB    Multiprotocol Interconnect on X.25 MIB   Elective       1461*
SNMPv2     Coexistence between SNMPv1 and SNMPv2    Elective       1452*
SNMPv2     Manager-to-Manager MIB                   Elective       1451*
SNMPv2     Management Information Base for SNMPv2   Elective       1450*
SNMPv2     Transport Mappings for SNMPv2            Elective       1449*
SNMPv2     Protocol Operations for SNMPv2           Elective       1448*
SNMPv2     Party MIB for SNMPv2                     Elective       1447*
SNMPv2     Security Protocols for SNMPv2            Elective       1446*
SNMPv2     Administrative Model for SNMPv2          Elective       1445*
SNMPv2     Conformance Statements for SNMPv2        Elective       1444*
SNMPv2     Textual Conventions for SNMPv2           Elective       1443*
SNMPv2     SMI for SNMPv2                           Elective       1442*
SNMPv2     Introduction to SNMPv2                   Elective       1441*
SMTP-SIZE  SMTP Service Ext for Message Size        Elective       1427
SMTP-8BIT  SMTP Service Ext or 8bit-MIMEtransport   Elective       1426
SMTP-EXT   SMTP Service Extensions                  Elective       1425
PEM-KEY    PEM - Key Certification                  Elective       1424
PEM-ALG    PEM - Algorithms, Modes, and Identifiers Elective       1423
PEM-CKM    PEM - Certificate-Based Key Management   Elective       1422
PEM-ENC    PEM - Message Encryption and Auth        Elective       1421
SNMP-IPX   SNMP over IPX                            Elective       1420
SNMP-AT    SNMP over AppleTalk                      Elective       1419
SNMP-OSI   SNMP over OSI                            Elective       1418
FTP-FTAM   FTP-FTAM Gateway Specification           Elective       1415
IDENT-MIB  Identification MIB                       Elective       1414
IDENT      Identification Protocol                  Elective       1413
DS3/E3-MIB DS3/E3 Interface Type                    Elective       1407
DS1/E1-MIB DS1/E1 Interface Type                    Elective       1406
BGP-OSPF   BGP OSPF Interaction                     Elective       1403

--------   Route Advertisement In BGP2 And BGP3     Elective       1397
RIP2-MIB   RIP Version 2 MIB Extension              Elective       1389
RIP2       RIP Version 2-Carrying Additional Info.  Elective       1388
SNMP-X.25  SNMP MIB Extension for X.25 Packet Layer Elective       1382
SNMP-LAPB  SNMP MIB Extension for X.25 LAPB         Elective       1381
PPP-ATCP   PPP AppleTalk Control Protocol           Elective       1378
PPP-OSINLCP PPP OSI Network Layer Control Protocol  Elective       1377
PP-DNCP    PPP DECnet Phase IV Control Protocol     Elective       1376
802.3-MIB  IEEE 802.3 Repeater MIB                  Elective       1368
BGP-OSPF   BGP OSPF Interaction                     Elective       1364
TABLE-MIB  IP Forwarding Table MIB                  Elective       1354
SNMP-PARTY-MIB Administration of SNMP               Elective       1353
SNMP-SEC   SNMP Security Protocols                  Elective       1352
SNMP-ADMIN SNMP Administrative Model                Elective       1351
TOS        Type of Service in the Internet          Elective       1349
-------    Representation of Non-ASCII Text         Elective       1342
MIME       Multipurpose Internet Mail Extensions    Elective       1341
PPP-AUTH   PPP Authentication                       Elective       1334
PPP-LINK   PPP Link Quality Monitoring              Elective       1333
PPP-IPCP   PPP Control Protocol                     Elective       1332
PPP        Point-to-Point Protocol (PPP)            Elective       1331
-------    X.400 1988 to 1984 downgrading           Elective       1328
-------    Mapping between X.400(1988)              Elective       1327
TCP-EXT    TCP Extensions for High Performance      Elective       1323
-------    Def. Man. Objs Parallel-printer-like     Elective       1318
-------    Def. Man Objs RS-232-like                Elective       1317
-------    Def. Man. Objs. Character Stream         Elective       1316
FRAME-MIB  Management Information Base for Frame    Elective       1315
NETFAX     File Format for the Exchange of Images   Elective       1314
SIP-MIB    SIP Interface Type MIB                   Elective       1304
IARP       Inverse Address Resolution Protocol      Elective       1293
DECNET-MIB DECNET MIB                               Elective       1289
FDDI-MIB   FDDI-MIB                                 Elective       1285
-------    Encoding Network Addresses               Elective       1277
-------    Replication and Distributed Operations   Elective       1276
-------    COSINE and Internet X.500 Schema         Elective       1274
RMON-MIB   Remote Network Monitoring MIB            Elective       1271
BGP-MIB    Border Gateway Protocol MIB (Version 3)  Elective       1269
ICMP-ROUT  ICMP Router Discovery Messages           Elective       1256
OSPF-MIB   OSPF Version 2 MIB                       Elective       1253
IPSO       DoD Security Options for IP              Elective       1108
AT-MIB     Appletalk MIB                            Elective       1243
OSI-UDP    OSI TS on UDP                            Elective       1240
STD-MIBs   Reassignment of Exp MIBs to Std MIBs     Elective       1239
OSI-NSAP   Guidelines for OSI NSAP Allocation       Elective       1237
IPX-IP     Tunneling IPX Traffic through IP Nets    Elective       1234
802.5-MIB  IEEE 802.5 Token Ring MIB                Elective       1231
GINT-MIB   Extensions to the Generic-Interface MIB  Elective       1229

PPP-EXT    PPP Extensions for Bridging              Elective       1220
IS-IS      OSI IS-IS for TCP/IP Dual Environments   Elective       1195
IP-CMPRS   Compressing TCP/IP Headers               Elective       1144
ISO-TS-ECHO Echo for ISO-8473                       Elective       1139
-------    Mapping Between X.400(1984)              Elective   1026,987
NNTP       Network News Transfer Protocol           Elective        977

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   OSPF - RFC 1370 is an applicability statement for OSPF.

6.6.  Telnet Options

For convenience, all the Telnet Options are collected here with both
their state and status.

Protocol   Name                           Number  State Status  RFC STD
========   =====================================  ===== ====== ==== ====
TOPT-BIN   Binary Transmission                 0  Std   Rec     856  27
TOPT-ECHO  Echo                                1  Std   Rec     857  28
TOPT-RECN  Reconnection                        2  Prop  Ele     ...
TOPT-SUPP  Suppress Go Ahead                   3  Std   Rec     858  29
TOPT-APRX  Approx Message Size Negotiation     4  Prop  Ele     ...
TOPT-STAT  Status                              5  Std   Rec     859  30
TOPT-TIM   Timing Mark                         6  Std   Rec     860  31
TOPT-REM   Remote Controlled Trans and Echo    7  Prop  Ele     726
TOPT-OLW   Output Line Width                   8  Prop  Ele     ...
TOPT-OPS   Output Page Size                    9  Prop  Ele     ...
TOPT-OCRD  Output Carriage-Return Disposition 10  Prop  Ele     652
TOPT-OHT   Output Horizontal Tabstops         11  Prop  Ele     653
TOPT-OHTD  Output Horizontal Tab Disposition  12  Prop  Ele     654
TOPT-OFD   Output Formfeed Disposition        13  Prop  Ele     655
TOPT-OVT   Output Vertical Tabstops           14  Prop  Ele     656
TOPT-OVTD  Output Vertical Tab Disposition    15  Prop  Ele     657
TOPT-OLD   Output Linefeed Disposition        16  Prop  Ele     658
TOPT-EXT   Extended ASCII                     17  Prop  Ele     698
TOPT-LOGO  Logout                             18  Prop  Ele     727
TOPT-BYTE  Byte Macro                         19  Prop  Ele     735
TOPT-DATA  Data Entry Terminal                20  Prop  Ele    1043
TOPT-SUP   SUPDUP                             21  Prop  Ele     736
TOPT-SUPO  SUPDUP Output                      22  Prop  Ele     749
TOPT-SNDL  Send Location                      23  Prop  Ele     779
TOPT-TERM  Terminal Type                      24  Prop  Ele    1091
TOPT-EOR   End of Record                      25  Prop  Ele     885
TOPT-TACACS  TACACS User Identification       26  Prop  Ele     927

TOPT-OM    Output Marking                     27  Prop  Ele     933
TOPT-TLN   Terminal Location Number           28  Prop  Ele     946
TOPT-3270  Telnet 3270 Regime                 29  Prop  Ele    1041
TOPT-X.3   X.3 PAD                            30  Prop  Ele    1053
TOPT-NAWS  Negotiate About Window Size        31  Prop  Ele    1073
TOPT-TS    Terminal Speed                     32  Prop  Ele    1079
TOPT-RFC   Remote Flow Control                33  Prop  Ele    1372
TOPT-LINE  Linemode                           34  Draft Ele    1184
TOPT-XDL   X Display Location                 35  Prop  Ele    1096
TOPT-ENVIR Telnet Environment Option          36  Prop  Ele    1408
TOPT-AUTH  Telnet Authentication Option       37  Exp   Ele    1416
TOPT-EXTOP Extended-Options-List             255  Std   Rec     861  32

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

6.7.  Experimental Protocols

All Experimental protocols have the Limited Use status.

Protocol   Name                                                     RFC
========   =====================================                   =====
REM-PRT    An Experiment in Remote Printing                        1486*
RAP        Internet Route Access Protocol                          1476*
TP/IX      TP/IX: The Next Internet                                1475*
X400       Routing Coordination for X.400 Services                 1465*
DNS        Storing Arbitrary Attributes in DNS                     1464*
IRCP       Internet Relay Chat Protocol                            1459*
TOS-LS     Link Security TOS                                       1455*
SIFT/UFT   Sender-Initiated/Unsolicited File Transfer              1440*
DIR-ARP    Directed ARP                                            1433
TEL-SPX    Telnet Authentication: SPX                              1412
TEL-KER    Telnet Authentication: Kerberos V4                      1411
MAP-MAIL   X.400 Mapping and Mail-11                               1405
TRACE-IP   Traceroute Using an IP Option                           1393
DNS-IP     Experiment in DNS Based IP Routing                      1383
DNS NSAP   DNS NSAP RRs                                            1348
RMCP       Remote Mail Checking Protocol                           1339
MSP2       Message Send Protocol 2                                 1312
DSLCP      Dynamically Switched Link Control                       1307
--------   X.500 and Domains                                       1279
IN-ENCAP   Internet Encapsulation Protocol                         1241
CLNS-MIB   CLNS-MIB                                                1238
CFDP       Coherent File Distribution Protocol                     1235
SNMP-DPI   SNMP Distributed Program Interface                      1228
SNMP-MUX   SNMP MUX Protocol and MIB                               1227
IP-AX.25   IP Encapsulation of AX.25 Frames                        1226
ALERTS     Managing Asynchronously Generated Alerts                1224

MPP        Message Posting Protocol                                1204
ST-II      Stream Protocol                                         1190
SNMP-BULK  Bulk Table Retrieval with the SNMP                      1187
DNS-RR     New DNS RR Definitions                                  1183
NTP-OSI    NTP over OSI Remote Operations                          1165
EHF-MAIL   Encoding Header Field for Mail                          1154
DMF-MAIL   Digest Message Format for Mail                          1153
RDP        Reliable Data Protocol                              908,1151
--------   Mapping between X.400(88) and RFC-822                   1148
TCP-ACO    TCP Alternate Checksum Option                           1146
--------   Mapping full 822 to Restricted 822                      1137
IP-DVMRP   IP Distance Vector Multicast Routing                    1075
TCP-LDP    TCP Extensions for Long Delay Paths                     1072
IMAP2      Interactive Mail Access Protocol                   1176,1064
VMTP       Versatile Message Transaction Protocol                  1045
COOKIE-JAR Authentication Scheme                                   1004
NETBLT     Bulk Data Transfer Protocol                              998
IRTP       Internet Reliable Transaction Protocol                   938
AUTH       Authentication Service                                   931
LDP        Loader Debugger Protocol                                 909
RLP        Resource Location Protocol                               887
NVP-II     Network Voice Protocol                              ISI-memo
PVP        Packet Video Protocol                               ISI-memo

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

6.8.  Informational Protocols

Information protocols have no status.

Protocol   Name                                                     RFC
=======    ====================================                    =====
TACACS     Terminal Access Control Protocol                        1492*
SUN-NFS    Network File System Protocol                            1094*
SUN-RPC    Remote Procedure Call Protocol Version 2                1057*
GOPHER     The Internet Gopher Protocol                            1436
-------    Data Link Switching: Switch-to-Switch Protocol          1434
LISTSERV   Listserv Distribute Protocol                            1429
-------    Replication Requirements                                1275
PCMAIL     Pcmail Transport Protocol                               1056
MTP        Multicast Transport Protocol                            1301
BSD Login  BSD Login                                               1282
DIXIE      DIXIE Protocol Specification                            1249
IP-X.121   IP to X.121 Address Mapping for DDN                     1236
OSI-HYPER  OSI and LLC1 on HYPERchannel                            1223
HAP2       Host Access Protocol                                    1221
SUBNETASGN On the Assignment of Subnet Numbers                     1219

SNMP-TRAPS Defining Traps for use with SNMP                        1215
DAS        Directory Assistance Service                            1202
MD4        MD4 Message Digest Algorithm                            1186
LPDP       Line Printer Daemon Protocol                            1179

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

6.9.  Historic Protocols

All Historic protocols have Not Recommended status.

Protocol   Name                                                     RFC
=======    =====================================                   =====
OIM-MIB-II OSI Internet Management: MIB-II                         1214*
IMAP3      Interactive Mail Access Protocol Version 3              1203*
IP-ARC     Transmitting IP Traffic over ARCNET Nets                1201*
SUN-RPC    Remote Procedure Call Protocol Version 1                1050*
802.4-MIP  IEEE 802.4 Token Bus MIB                                1230
CMOT       Common Management Information Services                  1189
PPP-INIT   PPP Initial Configuration Options                       1172
MSP        Message Send Protocol                                   1159
--------   Mail Privacy: Procedures                                1113
--------   Mail Privacy: Key Management                            1114
--------   Mail Privacy: Algorithms                                1115
NFILE      A File Access Protocol                                  1037
HOSTNAME   HOSTNAME Protocol                                        953
SFTP       Simple File Transfer Protocol                            913
SUPDUP     SUPDUP Protocol                                          734
BGP        Border Gateway Protocol                            1163,1164
MIB-I      MIB-I                                                   1156
SGMP       Simple Gateway Monitoring Protocol                      1028
HEMS       High Level Entity Management Protocol                   1021
STATSRV    Statistics Server                                        996
POP2       Post Office Protocol, Version 2                          937
RATP       Reliable Asynchronous Transfer Protocol                  916
HFEP       Host - Front End Protocol                                929
THINWIRE   Thinwire Protocol                                        914
HMP        Host Monitoring Protocol                                 869
GGP        Gateway Gateway Protocol                                 823
RTELNET    Remote Telnet Service                                    818
CLOCK      DCNET Time Server Protocol                               778
MPM        Internet Message Protocol                                759
NETRJS     Remote Job Service                                       740
NETED      Network Standard Text Editor                             569
RJE        Remote Job Entry                                         407
XNET       Cross Net Debugger                                   IEN-158
NAMESERVER Host Name Server Protocol                            IEN-116

MUX        Multiplexing Protocol                                 IEN-90
GRAPHICS   Graphics Protocol                                  NIC-24308

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

7.  Contacts

7.1.  IAB, IETF, and IRTF Contacts

   7.1.1.  Internet Architecture Board (IAB) Contact

   Please send your comments about this list of protocols and especially
   about the Draft Standard Protocols to the Internet Architecture Board
   care of Bob Braden, IAB Executive Director.

      Contacts:

         Bob Braden
         Executive Director of the IAB
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         Braden@ISI.EDU

         Christian Huitema
         Chair of the IAB
         INRIA, Sophia-Antipolis
         2004 Route des Lucioles
         BP 109
         F-06561 Valbonne Cedex
         France

         +33 93 65 77 15

         Christian.Huitema@MIRSA.INRIA.FR

   7.1.2.  Internet Engineering Task Force (IETF) Contact

      Contacts:

         Phill Gross
         Chair of the IETF
         Advanced Network and Services
         100 Clearbrook Road
         Elmsford, NY  10523

         1-914-789-5300

         PGross@ANS.NET

         John Stewart
         IESG Secretary
         Corporation for National Research Initiatives
         1895 Preston White Drive, Suite 100
         Reston, VA 22091

         1-703-620-8990

         jstewart@CNRI.RESTON.VA.US

         Steve Coya
         Executive Director of the IETF
         Corporation for National Research Initiatives
         1895 Preston White Drive, Suite 100
         Reston, VA 22091

         1-703-620-8990

         scoya@CNRI.RESTON.VA.US

   7.1.3.  Internet Research Task Force (IRTF) Contact

      Contact:

         Jon Postel
         Chair of the IRTF
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         Postel@ISI.EDU

7.2.  Internet Assigned Numbers Authority Contact

      Contact:

         Joyce K. Reynolds
         Internet Assigned Numbers Authority
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         IANA@ISI.EDU

   The protocol standards are managed by the Internet Assigned Numbers
   Authority.

   Please refer to the document "Assigned Numbers" (RFC-1340) for
   further information about the status of protocol documents.  There
   are two documents that summarize the requirements for host and
   gateways in the Internet, "Host Requirements" (RFC-1122 and RFC-1123)
   and "Gateway Requirements" (RFC-1009).

      How to obtain the most recent edition of this "Internet Official
      Protocol Standards" memo:

         The file "in-notes/internet-standards.txt" may be copied via
         FTP from the VENERA.ISI.EDU computer using the FTP username
         "anonymous" and FTP password "guest".

7.3.  Request for Comments Editor Contact

      Contact:

         Jon Postel
         RFC Editor
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         RFC-Editor@ISI.EDU

   Documents may be submitted via electronic mail to the RFC Editor for
   consideration for publication as RFC.  If you are not familiar with
   the format or style requirements please request the "Instructions for
   RFC Authors".  In general, the style of any recent RFC may be used as
   a guide.

7.4.  The Network Information Center and
      Requests for Comments Distribution Contact

      RFC's may be obtained from DS.INTERNIC.NET via FTP, WAIS, and
      electronic mail.  Through FTP, RFC's are stored as rfc/rfcnnnn.txt
      or rfc/rfcnnnn.ps where 'nnnn' is the RFC number.  Login as
      "anonymous" and provide your e-mail address as the password.
      Through WAIS, you may use either your local WAIS client or telnet
      to DS.INTERNIC.NET and login as "wais" (no password required) to
      access a WAIS client.  Help information and a tutorial for using
      WAIS are available online.  The WAIS database to search is "rfcs".

      Directory and Database Services also provides a mail server
      interface.  Send a mail message to mailserv@ds.internic.net and
      include any of the following commands in the message body:

         document-by-name rfcnnnn      where 'nnnn' is the RFC number
                                       The text version is sent.

         file /ftp/rfc/rfcnnnn.yyy     where 'nnnn' is the RFC number.
                                       and 'yyy' is 'txt' or 'ps'.

         help                          to get information on how to use
                                       the mailserver.

      The InterNIC directory and database services collection of
      resource listings, internet documents such as RFCs, FYIs, STDs,
      and Internet Drafts, and publicly accessible databases are also

      now available via Gopher.  All our collections are WAIS indexed
      and can be searched from the Gopher menu.

      To access the InterNIC Gopher Servers, please connect to
      "internic.net" port 70.

      Contact: admin@ds.internic.net

7.5.  Sources for Requests for Comments

   Details on many sources of RFCs via FTP or EMAIL may be obtained by
   sending an EMAIL message to "rfc-info@ISI.EDU" with the message body
   "help: ways_to_get_rfcs".  For example:

           To: rfc-info@ISI.EDU
           Subject: getting rfcs

           help: ways_to_get_rfcs

8.  Security Considerations

   Security issues are not addressed in this memo.

9.  Author's Address

   Jon Postel
   USC/Information Sciences Institute
   4676 Admiralty Way
   Marina del Rey, CA 90292

   Phone: 310-822-1511
   Fax:   310-823-6714

   Email: Postel@ISI.EDU

 

User Contributions:

Comment about this RFC, ask questions, or add new information about this topic:

CAPTCHA