Network Working Group                                        J. Reynolds
Request for Comments: 961                                      J. Postel
                                                                     ISI
Obsoletes: RFCs 944, 924, 901, 880, 840                    December 1985
Page 1

OFFICIAL ARPA-INTERNET PROTOCOLS

STATUS OF THIS MEMO

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

INTRODUCTION

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 in the "Internet Protocol Transition Workbook" (IPTW) dated March 1982. There are several protocols in use that are not in the IPTW. A few of the protocols in the IPTW have been revised. Notably, the mail protocols have been revised and issued as a volume titled "Internet Mail Protocols" dated November 1982. Telnet and the most useful Telnet options have been revised and issued as a volume titled "Internet Telnet Protocol and Options" (ITP) dated June 1983. The File Transfer Protocol has been revised most recently as RFC 959 which is not yet included in any collection. Some protocols have not been revised for many years, these are found in the old "ARPANET Protocol Handbook" (APH) dated January 1978. There is also a volume of protocol related information called the "Internet Protocol Implementers Guide" (IPIG) dated August 1982.

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, or experimental.

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.


Page 2

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:

required

            - all hosts must implement the required protocol,

recommended

            - all hosts are encouraged to implement the recommended
            protocol,

elective

            - hosts may implement or not the elective protocol,

experimental

            - 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

none

            - this is not a protocol.

For further information about protocols in general, please contact:

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

Phone: (213) 822-1511

ARPA mail: JKREYNOLDS@USC-ISIB.ARPA


Page 3

OVERVIEW

Catenet Model ------------------------------------------------------

STATUS: None

SPECIFICATION: IEN 48 (in IPTW)

COMMENTS:

Gives an overview of the organization and principles of the Internet.

Could be revised and expanded.

OTHER REFERENCES:

Leiner, B., Cole R., Postel, J., and D. Mills, "The DARPA Protocol Suite", IEEE INFOCOM 85, Washington, D.C., March 1985. Also in IEEE Communications Magazine, and as ISI/RS-85-153, March 1985.

Postel, J., "Internetwork Applications Using the DARPA Protocol Suite", IEEE INFOCOM 85, Washington, D.C., March 1985. Also in IEEE Communications Magazine, and as ISI/RS-85-151, April 1985.

Padlipsky, M.A., "The Elements of Networking Style and other Essays and Animadversions on the Art of Intercomputer Networking", Prentice-Hall, New Jersey, 1985.

RFC 871 - A Perspective on the ARPANET Reference Model

DEPENDENCIES:

CONTACT: Postel@USC-ISIB.ARPA


Page 4

NETWORK LEVEL

Internet Protocol --------------------------------------------- (IP)

STATUS: Required

SPECIFICATION: RFC 791 (in IPTW)

COMMENTS:

This is the universal protocol of the Internet. This datagram protocol provides the universal addressing of hosts in the Internet.

A few minor problems have been noted in this document.

The most serious is a bit of confusion in the route options. The route options have a pointer that indicates which octet of the route is the next to be used. The confusion is between the phrases "the pointer is relative to this option" and "the smallest legal value for the pointer is 4". If you are confused, forget about the relative part, the pointer begins at 4.

Another important point is the alternate reassembly procedure suggested in RFC 815.

Some changes are in the works for the security option.

Note that ICMP is defined to be an integral part of IP. You have not completed an implementation of IP if it does not include ICMP.

OTHER REFERENCES:

RFC 815 (in IPIG) - IP Datagram Reassembly Algorithms

RFC 814 (in IPIG) - Names, Addresses, Ports, and Routes

RFC 816 (in IPIG) - Fault Isolation and Recovery

RFC 817 (in IPIG) - Modularity and Efficiency in Protocol Implementation

MIL-STD-1777 - Military Standard Internet Protocol

RFC 963 - Some Problems with the Specification of the Military Standard Internet Protocol


Page 5

DEPENDENCIES:

CONTACT: Postel@USC-ISIB.ARPA

Internet Control Message Protocol --------------------------- (ICMP)

STATUS: Required

SPECIFICATION: RFC 792 (in IPTW)

COMMENTS:

The control messages and error reports that go with the Internet Protocol.

A few minor errors in the document have been noted. Suggestions have been made for additional types of redirect message and additional destination unreachable messages.

A proposal for two additional ICMP message types is made in RFC 950 "Internet Subnets", Address Mask Request (A1=17), and Address Mask Reply (A2=18). The details of these ICMP types are subject to change. Use of these ICMP types is
experimental.

Note that ICMP is defined to be an integral part of IP. You have not completed an implementation of IP if it does not include ICMP.

OTHER REFERENCES: RFC 950

DEPENDENCIES: Internet Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 6

HOST LEVEL

User Datagram Protocol --------------------------------------- (UDP)

STATUS: Recommended

SPECIFICATION: RFC 768 (in IPTW)

COMMENTS:

Provides a datagram service to applications. Adds port addressing to the IP services.

The only change noted for the UDP specification is a minor clarification that if in computing the checksum a padding octet is used for the computation it is not transmitted or counted in the length.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: Postel@USC-ISIB.ARPA

Transmission Control Protocol -------------------------------- (TCP)

STATUS: Recommended

SPECIFICATION: RFC 793 (in IPTW)

COMMENTS:

Provides reliable end-to-end data stream service.

Many comments and corrections have been received for the TCP specification document. These are primarily document bugs rather than protocol bugs.

Event Processing Section: There are many minor corrections and clarifications needed in this section.

Push: There are still some phrases in the document that give a "record mark" flavor to the push. These should be further clarified. The push is not a record mark.

Urgent: Page 17 is wrong. The urgent pointer points to the last octet of urgent data (not to the first octet of non-urgent data).


Page 7

Listening Servers: Several comments have been received on difficulties with contacting listening servers. There should be some discussion of implementation issues for servers, and some notes on alternative models of system and process organization for servers.

Maximum Segment Size: The maximum segment size option should be generalized and clarified. It can be used to either increase or decrease the maximum segment size from the default. The TCP Maximum Segment Size is the IP Maximum Datagram Size minus forty. The default IP Maximum Datagram Size is 576. The default TCP Maximum Segment Size is 536. For further discussion, see RFC 879.

Idle Connections: There have been questions about
automatically closing idle connections. Idle connections are ok, and should not be closed. There are several cases where idle connections arise, for example, in Telnet when a user is thinking for a long time following a message from the server computer before his next input. There is no TCP "probe" mechanism, and none is needed.

Queued Receive Data on Closing: There are several points where it is not clear from the description what to do about data received by the TCP but not yet passed to the user, particularly when the connection is being closed. In general, the data is to be kept to give to the user if he does a RECV call.

Out of Order Segments: The description says that segments that arrive out of order, that is, are not exactly the next segment to be processed, may be kept on hand. It should also point out that there is a very large performance penalty for not doing so.

User Time Out: This is the time out started on an open or send call. If this user time out occurs the user should be notified, but the connection should not be closed or the TCB deleted. The user should explicitly ABORT the connection if he wants to give up.

OTHER REFERENCES:

RFC 813 (in IPIG) - Window and Acknowledgement Strategy in TCP

RFC 814 (in IPIG) - Names, Addresses, Ports, and Routes

RFC 816 (in IPIG) - Fault Isolation and Recovery


Page 8

RFC 817 (in IPIG) - Modularity and Efficiency in Protocol Implementation

RFC 879 - TCP Maximum Segment Size

RFC 889 - Internet Delay Experiments

RFC 896 - TCP/IP Congestion Control

MIL-STD-1778 - Military Standard Transmission Control Protocol

RFC 964 - Some Problems with the Specification of the Military Standard Transmission Control Protocol

DEPENDENCIES: Internet Protocol

CONTACT: Postel@USC-ISIB.ARPA

Host Monitoring Protocol ------------------------------------- (HMP)

STATUS: Elective

SPECIFICATION: RFC 869

COMMENTS:

This is a good tool for debugging protocol implementations in remotely located computers.

This protocol is used to monitor Internet gateways and the TACs.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: Hinden@BBN-UNIX.ARPA


Page 9

Cross Net Debugger ------------------------------------------ (XNET)

STATUS: Elective

SPECIFICATION: IEN 158

COMMENTS:

A debugging protocol, allows debugger like access to remote systems.

This specification should be updated and reissued as an RFC.

OTHER REFERENCES: RFC 643

DEPENDENCIES: Internet Protocol

CONTACT: Postel@USC-ISIB.ARPA

"Stub" Exterior Gateway Protocol ----------------------------- (EGP)

STATUS: Recommended for Gateways

SPECIFICATION: RFC 888, RFC 904

COMMENTS:

The protocol used between gateways of different administrations to exchange routing information.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 827, RFC 890

DEPENDENCIES: Internet Protocol

CONTACT: Mills@USC-ISID.ARPA


Page 10

Gateway Gateway Protocol ------------------------------------- (GGP)

STATUS: Experimental

SPECIFICATION: RFC 823

COMMENTS:

The gateway protocol now used in the core gateways.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: Brescia@BBN-UNIX.ARPA

Multiplexing Protocol ---------------------------------------- (MUX)

STATUS: Experimental

SPECIFICATION: IEN 90

COMMENTS:

Defines a capability to combine several segments from different higher level protocols in one IP datagram.

No current experiment in progress. There is some question as to the extent to which the sharing this protocol envisions can actually take place. Also, there are some issues about the information captured in the multiplexing header being (a) insufficient, or (b) over specific.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 11

Stream Protocol ----------------------------------------------- (ST)

STATUS: Experimental

SPECIFICATION: IEN 119

COMMENTS:

A gateway resource allocation protocol designed for use in multihost real time applications.

The implementation of this protocol has evolved and may no longer be consistent with this specification. The document should be updated and issued as an RFC.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: jwf@LL-EN.ARPA

Network Voice Protocol ------------------------------------ (NVP-II)

STATUS: Experimental

SPECIFICATION: ISI Internal Memo

COMMENTS:

Defines the procedures for real time voice conferencing.

The specification is an ISI Internal Memo which should be updated and issued as an RFC.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 741

DEPENDENCIES: Internet Protocol, Stream Protocol

CONTACT: Casner@USC-ISIB.ARPA


Page 12

Reliable Data Protocol --------------------------------------- (RDP)

STATUS: Experimental

SPECIFICATION: RFC 908

COMMENTS:

This protocol is designed to efficiently support the bulk transfer of data for such host monitoring and control applications as loading/dumping and remote debugging. The protocol is intended to be simple to implement but still be efficient in environments where there may be long transmission delays and loss or non-sequential delivery of message segments.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: CWelles@BBN-UNIX.ARPA

Internet Reliable Transaction Protocol ---------------------- (IRTP)

STATUS: Experimental

SPECIFICATION: RFC 938

COMMENTS:

This protocol is a transport level host to host protocol designed for an internet environment. While the issues discussed may not be directly relevant to the research problems of the DARPA community, they may be interesting to a number of researchers and implementors.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol

CONTACT: Trudy@ACC.ARPA


Page 13

APPLICATION LEVEL

Telnet Protocol ------------------------------------------- (TELNET)

STATUS: Recommended

SPECIFICATION: RFC 854 (in "Internet Telnet Protocol and Options")

COMMENTS:

The protocol for remote terminal access.

This has been revised since the IPTW. RFC 764 in IPTW is now obsolete.

OTHER REFERENCES:

MIL-STD-1782 - Telnet Protocol

DEPENDENCIES: Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 14

Telnet Options ------------------------------------ (TELNET-OPTIONS)

STATUS: Elective

SPECIFICATION: General description of options: RFC 855 (in "Internet Telnet Protocol and Options")

      Number   Name                                RFC  NIC  ITP APH USE
      ------   ---------------------------------   --- ----- --- --- ---
         0     Binary Transmission                 856 ----- yes obs yes
         1     Echo                                857 ----- yes obs yes
         2     Reconnection                        ... 15391  no yes  no
         3     Suppress Go Ahead                   858 ----- yes obs yes
         4     Approx Message Size Negotiation     ... 15393  no yes  no
         5     Status                              859 ----- yes obs yes
         6     Timing Mark                         860 ----- yes obs yes
         7     Remote Controlled Trans and Echo    726 39237  no yes  no
         8     Output Line Width                   ... 20196  no yes  no
         9     Output Page Size                    ... 20197  no yes  no
        10     Output Carriage-Return Disposition  652 31155  no yes  no
        11     Output Horizontal Tabstops          653 31156  no yes  no
        12     Output Horizontal Tab Disposition   654 31157  no yes  no
        13     Output Formfeed Disposition         655 31158  no yes  no
        14     Output Vertical Tabstops            656 31159  no yes  no
        15     Output Vertical Tab Disposition     657 31160  no yes  no
        16     Output Linefeed Disposition         658 31161  no yes  no
        17     Extended ASCII                      698 32964  no yes  no
        18     Logout                              727 40025  no yes  no
        19     Byte Macro                          735 42083  no yes  no
        20     Data Entry Terminal                 732 41762  no yes  no
        21     SUPDUP                          734 736 42213  no yes  no
        22     SUPDUP Output                       749 45449  no  no  no
        23     Send Location                       779 -----  no  no  no
        24     Terminal Type                       930 -----  no  no  no
        25     End of Record                       885 -----  no  no  no
        26     TACACS User Identification          927 -----  no  no  no
        27     Output Marking                      933 -----  no  no  no
        28     Terminal Location Number            946 -----  no  no  no
       255     Extended-Options-List               861 ----- yes obs yes

(obs = obsolete)

The ITP column indicates if the specification is included in the Internet Telnet Protocol and Options. The APH column indicates if the specification is included in the ARPANET Protocol Handbook. The USE column of the table above indicates which options are in general use.


Page 15

COMMENTS:

The Binary Transmission, Echo, Suppress Go Ahead, Status, Timing Mark, and Extended Options List options have been recently updated and reissued. These are the most frequently implemented options.

The remaining options should be reviewed and the useful ones should be revised and reissued. The others should be eliminated.

The following are recommended: Binary Transmission, Echo, Suppress Go Ahead, Status, Timing Mark, and Extended Options List.

OTHER REFERENCES:

DEPENDENCIES: Telnet

CONTACT: Postel@USC-ISIB.ARPA

File Transfer Protocol --------------------------------------- (FTP)

STATUS: Recommended

SPECIFICATION: RFC 959

COMMENTS:

The protocol for moving files between Internet hosts. Provides for access control and negotiation of file parameters.

The following new optional commands are included in this edition of the specification: Change to Parent Directory (CDUP), Structure Mount (SMNT), Store Unique (STOU), Remove Directory (RMD), Make Directory (MKD), Print Directory (PWD), and System (SYST). Note that this specification is compatible with the previous edition (RFC 765).

OTHER REFERENCES:

RFC 678 - Document File Format Standards

MIL-STD-1780 - File Transfer Protocol

DEPENDENCIES: Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 16

Trivial File Transfer Protocol ------------------------------ (TFTP)

STATUS: Elective

SPECIFICATION: RFC 783 (in IPTW)

COMMENTS:

A very simple file moving protocol, no access control is provided.

This is in use in several local networks.

Ambiguities in the interpretation of several of the transfer modes should be clarified, and additional transfer modes could be defined. Additional error codes could be defined to more clearly identify problems.

OTHER REFERENCES:

DEPENDENCIES: User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Simple File Transfer Protocol ------------------------------- (SFTP)

STATUS: Experimental

SPECIFICATION: RFC 913

COMMENTS:

SFTP is a simple file transfer protocol. It fills the need of people wanting a protocol that is more useful than TFTP but easier to implement (and less powerful) than FTP. SFTP supports user access control, file transfers, directory listing, directory changing, file renaming and deleting.

SFTP can be implemented with any reliable 8-bit byte stream oriented protocol, this document describes its TCP
specification. SFTP uses only one TCP connection; whereas TFTP implements a connection over UDP, and FTP uses two TCP connections (one using the TELNET protocol).

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:


Page 17

DEPENDENCIES: Transmission Control Protocol

CONTACT: MKL@SRI-NIC.ARPA

Simple Mail Transfer Protocol ------------------------------- (SMTP)

STATUS: Recommended

SPECIFICATION: RFC 821 (in "Internet Mail Protocols")

COMMENTS:

The procedure for transmitting computer mail between hosts.

This has been revised since the IPTW, it is in the "Internet Mail Protocols" volume of November 1982. RFC 788 (in IPTW) is obsolete.

There have been many misunderstandings and errors in the early implementations. Some documentation of these problems can be found in the file [ISIB]<SMTP>MAIL.ERRORS.

Some minor differences between RFC 821 and RFC 822 should be resolved.

OTHER REFERENCES:

RFC 822 - Mail Header Format Standards

This has been revised since the IPTW, it is in the "Internet Mail Protocols" volume of November 1982. RFC 733 (in IPTW) is obsolete. Further revision of RFC 822 is needed to correct some minor errors in the details of the
specification.

MIL-STD-1781 - Simple Mail Transfer Protocol (SMTP)

DEPENDENCIES: Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 18

Resource Location Protocol ----------------------------------- (RLP)

      STATUS:   Elective

      SPECIFICATION:   RFC 887

COMMENTS:

A resource location protocol for use in the ARPA-Internet. This protocol utilizes the User Datagram Protocol (UDP) which in turn calls on the Internet Protocol to deliver its datagrams.

OTHER REFERENCES:

DEPENDENCIES: User Datagram Protocol

      CONTACT:   Accetta@CMU-CS-A.ARPA

Loader Debugger Protocol ------------------------------------- (LDP)

STATUS: Experimental

SPECIFICATION: RFC 909

COMMENTS:

Specifies a protocol for loading, dumping and debugging target machines from hosts in a network environment. It is also designed to accommodate a variety of target CPU types. It provides a powerful set of debugging services, while at the same time, it is structured so that a simple subset may be implemented in applications like boot loading where efficiency and space are at a premium.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Reliable Data Protocol

CONTACT: Hinden@BBN-UNIX.ARPA


Page 19

Remote Job Entry --------------------------------------------- (RJE)

STATUS: Elective

SPECIFICATION: RFC 407 (in APH)

COMMENTS:

The general protocol for submitting batch jobs and retrieving the results.

Some changes needed for use with TCP.

No known active implementations.

OTHER REFERENCES:

DEPENDENCIES: File Transfer Protocol
Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA

Remote Job Service ---------------------------------------- (NETRJS)

STATUS: Elective

SPECIFICATION: RFC 740 (in APH)

COMMENTS:

A special protocol for submitting batch jobs and retrieving the results used with the UCLA IBM OS system.

Please discuss any plans for implementation or use of this protocol with the contact.

Revision in progress.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Braden@UCLA-CCN.ARPA


Page 20

Remote Telnet Service ------------------------------------ (RTELNET)

STATUS: Elective

SPECIFICATION: RFC 818

COMMENTS:

Provides special access to user Telnet on a remote system.

OTHER REFERENCES:

DEPENDENCIES: Telnet, Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA

Graphics Protocol --------------------------------------- (GRAPHICS)

STATUS: Elective

SPECIFICATION: NIC 24308 (in APH)

COMMENTS:

The protocol for vector graphics.

Very minor changes needed for use with TCP.

No known active implementations.

OTHER REFERENCES:

DEPENDENCIES: Telnet, Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 21

Echo Protocol ----------------------------------------------- (ECHO)

STATUS: Recommended

SPECIFICATION: RFC 862

COMMENTS:

Debugging protocol, sends back whatever you send it.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Discard Protocol ----------------------------------------- (DISCARD)

STATUS: Elective

SPECIFICATION: RFC 863

COMMENTS:

Debugging protocol, throws away whatever you send it.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Character Generator Protocol ----------------------------- (CHARGEN)

STATUS: Elective

SPECIFICATION: RFC 864

COMMENTS:

Debugging protocol, sends you ASCII data.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol


Page 22

CONTACT: Postel@USC-ISIB.ARPA

Quote of the Day Protocol ---------------------------------- (QUOTE)

STATUS: Elective

SPECIFICATION: RFC 865

COMMENTS:

Debugging protocol, sends you a short ASCII message.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Active Users Protocol -------------------------------------- (USERS)

STATUS: Elective

SPECIFICATION: RFC 866

COMMENTS:

Lists the currently active users.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Finger Protocol ------------------------------------------- (FINGER)

STATUS: Elective

SPECIFICATION: RFC 742 (in APH)

COMMENTS:

Provides information on the current or most recent activity of a user.

Some extensions have been suggested.


Page 23

Some changes are are needed for TCP.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA

WhoIs Protocol ------------------------------------------- (NICNAME)

STATUS: Elective

SPECIFICATION: RFC 954

COMMENTS:

Accesses the ARPANET Directory database. Provides a way to find out about people, their addresses, phone numbers, organizations, and mailboxes.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Feinler@SRI-NIC.ARPA

Domain Name Protocol -------------------------------------- (DOMAIN)

STATUS: Recommended

SPECIFICATION: RFC 881, 882, 883

COMMENTS:

OTHER REFERENCES:

RFC 920 - Domain Requirements

RFC 921 - Domain Name Implementation Schedule - Revised

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Mockapetris@USC-ISIB.ARPA


Page 24

HOSTNAME Protocol --------------------------------------- (HOSTNAME)

STATUS: Elective

SPECIFICATION: RFC 953

COMMENTS:

Accesses the Registered Internet Hosts database (HOSTS.TXT). Provides a way to find out about a host in the Internet, its Internet Address, and the protocols it implements.

OTHER REFERENCES:

RFC 952 - Host Table Specification

DEPENDENCIES: Transmission Control Protocol

CONTACT: Feinler@SRI-NIC.ARPA

Host Name Server Protocol ----------------------------- (NAMESERVER)

STATUS: Experimental

SPECIFICATION: IEN 116 (in IPTW)

COMMENTS:

Provides machine oriented procedure for translating a host name to an Internet Address.

This specification has significant problems: 1) The name syntax is out of date. 2) The protocol details are ambiguous, in particular, the length octet either does or doesn't include itself and the op code. 3) The extensions are not supported by any known implementation.

This protocol is now abandoned in favor of the DOMAIN protocol. Further implementations of this protocol are not advised.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 25

CSNET Mailbox Name Server Protocol ---------------------- (CSNET-NS)

STATUS: Experimental

SPECIFICATION: CS-DN-2

COMMENTS:

Provides access to the CSNET data base of users to give information about users names, affiliations, and mailboxes.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Solomon@UWISC.ARPA

Daytime Protocol ----------------------------------------- (DAYTIME)

STATUS: Elective

SPECIFICATION: RFC 867

COMMENTS:

Provides the day and time in ASCII character string.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

Network Time Protocol ---------------------------------------- (NTP)

STATUS: Experimental

SPECIFICATION: RFC 958

COMMENTS:

A proposed protocol for synchronizing a set of network clocks using a set of distributed clients and servers.


Page 26

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 778, RFC 891, RFC 956, and RFC 957.

DEPENDENCIES: User Datagram Protocol

CONTACT: Mills@USC-ISID.ARPA

Time Server Protocol ---------------------------------------- (TIME)

STATUS: Elective

SPECIFICATION: RFC 868

COMMENTS:

Provides the time as the number of seconds from a specified reference time.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol
or User Datagram Protocol

CONTACT: Postel@USC-ISIB.ARPA

DCNET Time Server Protocol --------------------------------- (CLOCK)

STATUS: Experimental

SPECIFICATION: RFC 778

COMMENTS:

Provides a mechanism for keeping synchronized clocks.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Control Message Protocol

CONTACT: Mills@USC-ISID.ARPA


Page 27

SUPDUP Protocol ------------------------------------------- (SUPDUP)

STATUS: Elective

SPECIFICATION: RFC 734 (in APH)

COMMENTS:

A special Telnet like protocol for display terminals.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Crispin@SU-SCORE.ARPA

Internet Message Protocol ------------------------------------ (MPM)

STATUS: Experimental

SPECIFICATION: RFC 759

COMMENTS:

This is an experimental multimedia mail transfer protocol. The implementation is called a Message Processing Module or MPM.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

RFC 767 - Structured Document Formats

DEPENDENCIES: Transmission Control Protocol

CONTACT: Postel@USC-ISIB.ARPA


Page 28

Post Office Protocol - Version 2 ---------------------------- (POP2)

STATUS: Experimental

SPECIFICATION: RFC 937

COMMENTS:

The intent of the Post Office Protocol - Version 2 (POP2) is to allow a user's workstation to access mail from a mailbox server. It is expected that mail will be posted from the workstation to the mailbox server via the Simple Mail Transfer Protocol (SMTP).

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: Obsoletes RFC 918

DEPENDENCIES: Transmission Control Protocol

CONTACT: JKReynolds@USC-ISIB.ARPA

Network Standard Text Editor ------------------------------- (NETED)

STATUS: Elective

SPECIFICATION: RFC 569

COMMENTS:

Describes a simple line editor which could be provided by every Internet host.

OTHER REFERENCES:

DEPENDENCIES:

CONTACT: Postel@USC-ISIB.ARPA


Page 29

Authentication Service -------------------------------------- (AUTH)

STATUS: Experimental

SPECIFICATION: RFC 931

COMMENTS:

This server provides a means to determine the identity of a user of a particular TCP connection. Given a TCP port number pair, it returns a character string which identifies the owner of that connection on the server's system.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: Supercedes RFC 912

DEPENDENCIES: Transmission Control Protocol

CONTACT: StJohns@MIT-Multics.ARPA

Bootstrap Protocol ----------------------------------------- (BOOTP)

STATUS: Experimental

SPECIFICATION: RFC 951

COMMENTS:

This proposed protocol provides an IP/UDP bootstrap protocol which allows a diskless client machine to discover its own IP address, the address of a server host, and the name of a file to be loaded into memory and executed.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Internet Protocol, User Datagram Protocol

CONTACT: Croft@SUMEX-AIM.ARPA


Page 30

APPENDICES

Assigned Numbers ---------------------------------------------------

STATUS: None

SPECIFICATION: RFC 960

COMMENTS:

Describes the fields of various protocols that are assigned specific values for actual use, and lists the currently assigned values.

Issued November 1985, replaces RFC 943, RFC 790 in IPTW, and RFC 923.

OTHER REFERENCES:

CONTACT: JKReynolds@USC-ISIB.ARPA

Pre-emption --------------------------------------------------------

STATUS: Elective

SPECIFICATION: RFC 794 (in IPTW)

COMMENTS:

Describes how to do pre-emption of TCP connections.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA


Page 31

Service Mappings ---------------------------------------------------

STATUS: None

SPECIFICATION: RFC 795 (in IPTW)

COMMENTS:

Describes the mapping of the IP type of service field onto the parameters of some specific networks.

Out of date, needs revision.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

Address Mappings ---------------------------------------------------

STATUS: None

SPECIFICATION: RFC 796 (in IPTW)

COMMENTS:

Describes the mapping between Internet Addresses and the addresses of some specific networks.

Out of date, needs revision.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

Document Formats ---------------------------------------------------

STATUS: None

SPECIFICATION: RFC 678

COMMENTS:

Describes standard format rules for several types of documents.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA


Page 32

Bitmap Formats -----------------------------------------------------

STATUS: None

SPECIFICATION: RFC 797

COMMENTS:

Describes a standard format for bitmap data.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

Facsimile Formats --------------------------------------------------

STATUS: None

SPECIFICATION: RFC 804

COMMENTS:

Describes a standard format for facsimile data.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

Host-Front End Protocol ------------------------------------- (HFEP)

STATUS: Experimental

SPECIFICATION: RFC 929

COMMENTS:

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 928

DEPENDENCIES:

CONTACT: Padlipsky@USC-ISI.ARPA


Page 33

Internet Protocol on X.25 Networks ------------------------ (IP-X25)

STATUS: Recommended

SPECIFICATION: RFC 877

COMMENTS:

Describes a standard for the transmission of IP Datagrams over Public Data Networks.

OTHER REFERENCES:

CONTACT: jtk@PURDUE.ARPA

Internet Protocol on DC Networks --------------------------- (IP-DC)

STATUS: Elective

SPECIFICATION: RFC 891

COMMENTS:

OTHER REFERENCES:

RFC 778 - DCNET Internet Clock Service

CONTACT: Mills@USC-ISID.ARPA

Internet Protocol on Ethernet Networks ---------------------- (IP-E)

STATUS: Recommended

SPECIFICATION: RFC 894

COMMENTS:

OTHER REFERENCES: RFC 893

CONTACT: Postel@USC-ISIB.ARPA


Page 34

Internet Protocol on Experimental Ethernet Networks -------- (IP-EE)

STATUS: Recommended

SPECIFICATION: RFC 895

COMMENTS:

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

Internet Protocol on IEEE 802.3 -------------------------- (IP-IEEE)

STATUS: Recommended

SPECIFICATION: RFC 948

COMMENTS: A proposed protocol of two methods of encapsulating Internet Protocol (IP) datagrams on an IEEE 802.3 network.

OTHER REFERENCES:

CONTACT: Ira@UPENN.CSNET

Internet Subnet Protocol ---------------------------------- (IP-SUB)

STATUS: Recommended

SPECIFICATION: RFC 950

COMMENTS:

Specifies procedures for the use of subnets, including the ultility of "subnets" of Internet networks, which are logically visible sub-sections of a single Internet. Recommended in the sense of "if you do subnetting at all do it this way".

OTHER REFERENCES: RFC 940, RFC 917, RFC 925, RFC 932, RFC 936, RFC 922

DEPENDENCIES:

CONTACT: Mogul@SU-SCORE.ARPA


Page 35

Broadcasting Internet Datagrams ------------------------- (IP-BROAD)

STATUS: Experimental

SPECIFICATION: RFC 919

COMMENTS:

A proposed protocol of simple rules for broadcasting Internet datagrams on local networks that support broadcast, for addressing broadcasts, and for how gateways should handle them.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 922

DEPENDENCIES:

CONTACT: Mogul@SU-SCORE.ARPA

Address Resolution Protocol ---------------------------------- (ARP)

STATUS: Recommended

SPECIFICATION: RFC 826

COMMENTS:

This is a procedure for finding the network hardware address corresponding to an Internet Address.

OTHER REFERENCES:

CONTACT: Postel@USC-ISIB.ARPA

A Reverse Address Resolution Protocol ----------------------- (RARP)

STATUS: Elective

SPECIFICATION: RFC 903

COMMENTS:

This is a procedure for workstations to dynamically find their protocol address (e.g., their Internet Address), when they only only know their hardware address (e.g., their attached physical network address).


Page 36

OTHER REFERENCES:

CONTACT: Mogul@SU-SCORE.ARPA

Multi-LAN Address Resolution Protocol ----------------------- (MARP)

STATUS: Experimental

SPECIFICATION: RFC 925

COMMENTS:

Discussion of the various problems and potential solutions of "transparent subnets" in a multi-LAN environment.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES: RFC 917, RFC 826

DEPENDENCIES:

CONTACT: Postel@USC-ISIB.ARPA

Broadcasting Internet Datagrams with Subnets --------- (IP-SUB-BROAD)

STATUS: Experimental

SPECIFICATION: RFC 922

COMMENTS:

A proposed protocol of simple rules for broadcasting Internet datagrams on local networks that support broadcast, for addressing broadcasts, and for how gateways should handle them.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES:

CONTACT: Mogul@SU-SCORE.ARPA


Page 37

Host Access Protocol ----------------------------------------- (HAP)

STATUS: Recommended

SPECIFICATION: RFC 907

COMMENTS:

This protocol specifies the network-access level communication between an arbitrary computer, called a host, and a packet-switched satellite network, e.g., SATNET or WBNET.

Note: Implementations of HAP should be performed in coordination with satellite network development and operations personnel.

OTHER REFERENCES:

DEPENDENCIES:

CONTACT: Schoen@BBN-UNIX.ARPA

Reliable Asynchronous Transfer Protocol --------------------- (RATP)

STATUS: Experimental

SPECIFICATION: RFC 916

COMMENTS:

This paper specifies a protocol which allows two programs to reliably communicate over a communication link. It ensures that the data entering one end of the link if received arrives at the other end intact and unaltered. This proposed protocol is designed to operate over a full duplex point-to-point connection. It contains some features which tailor it to the RS-232 links now in current use.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES: Transmission Control Protocol

CONTACT: Finn@USC-ISIB.ARPA


Page 38

Thinwire Protocol --------------------------------------- (THINWIRE)

STATUS: Experimental

SPECIFICATION: RFC 914

COMMENTS:

This paper discusses a Thinwire Protocol for connecting personal computers to the ARPA-Internet. It primarily focuses on the particular problems in the ARPA-Internet of low speed network interconnection with personal computers, and possible methods of solution.

Please discuss any plans for implementation or use of this protocol with the contact.

OTHER REFERENCES:

DEPENDENCIES:

CONTACT: Farber@ROCHESTER.ARPA