RFC661

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Network Working Group J. Postel Request for Comments: 661 SRI-ARC NIC: 31203 November 1974


                      Protocol Information

This file contains information on the various protocols in the ARPA Network. An effort will be made to keep the information current, but this depends on the cooperation of the users of this file to convey any information about protocol developments, or corrections to this information to Jon Postel at SRI-ARC.

This is a compendium of all the protocol related activity and most of this activity is with experimental protocols, for those protocols, which are official standards the designation "[Official]" will be appended to the name.

Much of the documentation of protocols appears as Requests for Comments (RFCs) and many of these are available online. When a document is accessible online, a pointer to that source will be given. Also note that recent RFCs are online at Office-1 in directory <NETINFO> with names of the form RFCnnn.TXT where nnn is replaced by the RFC number.

This file is online as:

  Pathname: [SRI-ARC] <POSTEL> PROTOCOL-INFORMATION.TXT
  and also [SRI-ARC] <POSTEL> PROTOCOL-INFORMATION.NLS

IMP-IMP

  surface
     Contact:
        McKenzie, Alex. (MCKENZIE@BBN)
     Documents:
        Heart, F. et. Al. "The Interface Message Processor for the
        ARPA Computer Network," AFIPS Conference Proceedings,
        36:551-567, SJCC 1970.
     People:
        John McQuillan (MCQUILLAN@BBN)



     Schedule:
     Recent developments:
  satellite
     Contact:
        Randy Rettberg (RETTEBERG@BBN)
     Documents:
     People:
        Kahn, Robert. (Kahn@ISI)
     Schedule:
     Recent developments:

IMP-HOST

  IMP-Host [Official]
     Contact:
        McKenzie, A. (McKenzie@BBN)
     Documents:
        "Specification for the Interconnection of a Host and an
        IMP," BBN Report 1822, Revised March 1974.
        McQuillan, J. "Host Alive/Dead Logic," BBN Memorandum to
        Technical Liaisons, 18-July-74.
        Burchfiel, J. "Ready Line Philosophy and Implementation,"
        NIC 30872, RFC 642, 5-July-74.
        Walden, D. "Some Changes to the IMP and the IMP/HOST
        Interface," RFC 660, 23-Oct-74.
           [Office-1 <NETINFO> RFC660.TXT
     People:
        McKenzie (MCKENZIE@BBN)




        Walden (WALDEN@BBN)
        Postel (POSTEL@SRI-ARC)
        Burchfiel (BURCHFIEL@BBN)
        McQuillan (MCQUILLAN@BBN)
     Schedule:
     Recent developments:
        The "link number" filed has been extended from 8 to 12 bits
        and renamed the "message identification" field.  Message
        type 6 now is used to indicate a reason for a type 7
        (destination dead) message. (See BBN1822).
        There has been some recent changes to the Ready line
        interpretation by the IMP for deciding the alive/dead status
        of a host.
        Important changes to the IMP and IMP/HOST interface
        announced in RFC 660 23-Oct-74.

HOST-HOST

  ncp - standard host-to-host [Official]
     Contact:
        Postel, Jon. (POSTEL@SRI-ARC)
     Documents:
        McKenzie, A. "Host/Host Protocol for the ARPA Network," NIC
        8246.  Jan 1972.
        Postel, J. "Assigned Link Numbers," RFC604, NIC21186, 26-
        Dec-73.
     People:
        Postel, Jon. (POSTEL@SRI-ARC)
        McKenzie, Alex. (MCKENZIE@BBN)
     Schedule:




     Recent developments:
  ncp - standard host-to-host [Experimental]
     Contact:
        Postel, Jon. (POSTEL@SRI-ARC)
     Documents:
        McKenzie, A. "Host/Host Protocol for the ARPA Network," NICE
        3246. Jan 1972.
        Postel, J. "Assigned Link Numbers," RFC604, NIC22186, 26-
        Dec-73.
        Burchfiel, et. Al. "Tip-Tenex Reliability Improvements" RFC
        636 NIC 30490 June 1974.
     People:
        Postel, Jon. (POSTEL@SRI-ARC)
        McKenzie, Alex. (MCKENZIE@BBN)
        Burchfiel, Jerry (BURCHFIEL@BBN)
        Walden, Dave (WALDEN@BBN)
     Schedule:
     Recent developments:
        The BBN TIP and TENEX groups have specified and are
        implementing additional protocol commands with the intention
        of providing better reliability and survivability over
        system malfunctions.  The additional protocol commands are
        for cleaning up partly closed connections and
        resynchronizing the allocation values on open connections.
        (See RFC 636).

tcp - Transmission Control Protocol

  Contact:
     Cerf, Vint. (CERF@ISI)




  Documents:
     Cert, V. and R. Kahn. "A Protocol for Packet Network
     Intercommunication," IEEE Transactions on Communication Vol
     COM-22 No 5, May 1974.
     [parc-maxc] <cerf> TCPSPEC3.NLS
     Mader, E. "A Protocol Experiment," RFC 700, NIC 31020.
     [ISI] <CERF> TCP-CHANGES.
  People:
     Cerf at SU-DSL
     Tomlinson at BBN
     Kirstein at London
     Postel at SRI-ARC
  Schedule:
     Some experiments now running.  Implementation of full protocol
     to begin by 15-Oct-74.
  Recent developments:
     Specification completed August 4th, but some work still in
     progress on handling of single message conversations.  A new
     sequencing scheme (proposed by Tomlinson) may be utilized.  The
     addressing field is now used as 4-bit format, 4-bit network, 16
     bit TCP, and 24 bit process&port.  Crocker has suggested a 64-
     bit path address to be parsed and reformatted by the gateways
     along the route.  There is reluctance to experiment with too
     many things at one though.
     (28-Oct-74) A file indicating some of the changes in the
     specifications since the 4-Aug-74 document is now available as
     [ISI] <CERF> TCP-CHANGES.  The areas of change are "Initial
     Sequence Number", "Socket definition", "Additional user System
     Calls", "Packet format", and "Discussion of opening and closing
     (SYN,REL)".
     (23-NOV-74) Specifications for test implementation are now said
     to be ready on 1-DEC-74, and an implementation completed by 1-
     FEB-74.



nvp - Network Voice Protocol

  Contact:
     Cohen, Danny. (COHEN@ISI)
  Documents:
     The current specification is in an online file at isi in the
     directory voice as nvp.lst.
     Pathname = [isi] <voice> nvp.lst
  People:
  Recent developments:
     New specification document available (10-Oct-74).
        "Specifications for the Network Voice Protocol (NVP)" NSC
        Note 43

packet radio

  Contact:
     Kahn, Robert. (KAHN@ISI)
  Documents:
  People:
  Schedule:
  Recent developments:

Network Debugging Protocol

  Contact:
     Eric Mader (Mader@BBN)
  Documents:
     Mader, E. "Network Debugging Protocol," NIC 30873, RFC 643,
     July-74.
  People:



  Schedule:
  Recent Developments:
     This is a protocol for a PDP-11 cross-network debugger.

HOST-FRONTEND

  Host-Front End
     Contact:
        Michael Padlipsky (MAP@CASE-10)
     Documents:
        Padlipsky, M. "A Proposed Protocol for Connecting Host
        Computers to ARPA-Like Networks via Front-End Processors,"
        RFC 647, NIC 31117, 12-Nov-74.
           [Office-1] <NETINFO>RFC647.TXT
     People:
        Padlipsky at MITRE Washington (MAP@CASE-10)
        Postel at SRI-ARC (POSTEL@SRI-ARC)
        McConnell at Illiac (JOHN@I4-TENEX)
     Schedule:
     Recent developments:
        This is a suggested simple protocol for connecting to host
        to front end computers, which are in turn connected to the
        network.

PROCESS-PROCESS

  ICP - Initial Connection Protocol [Official]
     Contact:
        Postel, Jon. [POSTEL@SRI-ARC)





     Documents:
        Postel, J. "Official Initial Connection Protocol," NIC 7101
        11-June-71.
        Wolfe, S. [no title] RFC 202 NIC 7155 26-July-71.
        Postel, J. "Official Telnet-Logger Initial Connection
        Protocol," NIC 7103 15-June-71.
     People:
        Postel at Sri-arc
     Schedule:
     Recent developments:
  Telnet
     Old Telnet
        Contact:
           Postel, Jon. (POSTEL@SRI-ARC)
        Documents:
           Postel, J. "Telnet Protocol," RFC 318 3-April-72.
        People:
        Schedule:
        Recent developments:
     New Telnet [Official]
        Contact:
           Postel at SRI-ARC
        Documents:
           NIC 18639 "TELNET Protocol Specifications" AUG 73
           NIC 1864C "Telnet Option Specification" Aug 73




              Telnet Options
                 NIC 15389 "Binary Transmission"
                 NIC 15390 "Echo"
                 NIC 15391 "Reconnection"
                 NIC 15392 "Suppress Go Ahead Option"
                 NIC 15393 "Approximate Message Size Negotiation"
                 NIC 31154 "Status" RFC 65125-Oct-74.
                    [Office] <NETINFO>RFC651.TXT
                 NIC 16236 "Timing Mark"
                 NIC 19859 "Remote Controlled Transmission and
                 Echoing" 1-Nov-73.
                 NIC 20196 "Output Line Width" 13-Nov-73.
                 NIC 20197 "Output Page Size" 13-Nov-73.
                 NIC 31155 "Output Carriage Return Disposition" RFC
                 652 25-Oct-74.
                    [Office-1] <NETINFO>RFC652.TXT
                 NIC 31157 "Output Horizontal Tab Disposition" RFC
                 654 25-Oct-74.
                    [Office-1] <NETINFO>RFC653.TXT
                 NIC 31156 "Output Horizontal Tab Stops" RFC 653
                 25-Oct-74.
                    [Office-1] <NETINFO>RFC653.TXT
                 NIC31157 "Output Form Feed Disposition" RFC 655
                 25-Oct-74.
                    [Office-1] <NETINFO>RFC655.TXT
                 NIC 31159 "Output Vertical Tab Stops" RFC 656 25-
                 Oct-74.




                    [Office-1] <NETINFO>RFC656.TXT
                 NIC 31160 "Output Vertical Tab Disposition" RFC 657
                 25-Oct-74
                    [Office-1] <NETINFO>RFC657.TXT
                 NIC 31161 "Output Line Feed Disposition" RFC 658
                 25-Oct-74.
                    [Office-1] <NETINFO>RFC658.TXT
                 NIC 16239 "Extended Options List"
        People:
           Jon Postel at Sri-Arc (POSTEL@SRI-ARC)
           Alex McKenzie at BBN (MCKENZIE@BBN)
           Doug Dodds at BBN (DODDS@BBN)
           Dave Crocker at UCLA-NMC (DCROCKER@ISI)
           Kurt Barthelmess at UCSD (BOWLES@ISI)
        Schedule:
           All Hosts were to have been running the new Telnet (both
           user and server) by 1 January 1974.
        Recent developments:
           A significant number of server systems now have new
           telnet implementations. (See RFC 702).
              Note: the server program is to be available on socket
              23 decimal (27 octal).
           The Status Option has been revised to take advantage of
           the subcommand feature and to reduce the amount of data
           transmitted to report the option status.
           Seven new options have been defined to allow control of
           the format effectors Carriage Return, Line Feed, Form
           Feed, Horizontal Tab, and Vertical Tab.




FTP

  Old File Transfer
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        McKenzie, A. "File Transfer Protocol," NIC 14333, RFC 454,
        16-Feb-73.
     People:
     Schedule:
     Recent developments:
  New File Transfer
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        Neigus, N. "File Transfer Protocol," NIC 17759 RFC 542 12-
        July-73.
        Postel, J. "Revised FTP Reply codes," NIC 30843 RFC 640 5-
        June-74.
     People:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
        Nancy Neigus at BBN (NEIGUS@BBN)
        Ken Pogran at MIT-Multics (Pogran.CompNet@MIT-Multics)
        Wayne Hathaway at NASA AMES (Hathaway@AMES-67)
        Mark Krilanovich at UCSB (Krilanovich@UCSB-MOD75)
        Kurt Barthelmess at UCSD (BOWLES@ISI)
     Schedule:



     Recent developments:
  Pathnames
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        Crocker, D. "Network Standard Data Specification Syntax,"
        RFC 645, NIC 30899, Jul-74.
     People:
        Dave Crocker at UCLA-NMC (DCROCKER@ISI)
     Schedule:
     Recent developments:
  File Access Protocol
     Contact:
        John Day (Day. CAC@MIT-Multics)
     Documents:
        Day, J. "Memo to FTP Group: File Access Protocol," RFC 520,
        NIC 16819, 25-Jun-73
     People:
        Ken Pogran (Pogran.CompNet@MIT-Multics)
     Schedule:
     Recent developments:

Mail

  Current Mail
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)




     Documents:
        page 26 of RFC 454 (see old file transfer).
        Bhushan, A. "Standardizing Network Mail Headers," NIC 18516,
        RFC 561, 5-Sep-73
        Sussman, J. "FTP Error Code Usage for More Reliable Mail
        Service," RFC 630, NIC 30874, RFC 644, 22-July-74.
     People:
        Julie Sussman at bbn (SUSSMAN@BBN)
        Bob Thomas at bbn (BTHOMAS@BBN)
     Schedule:
     Recent developments:
        Concern over the authentication of the author of network
        messages has led to the concept of an authorized mail
        sending process (see RFC 644).
  Proposed Mail
     Contact:
        Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        White, J. "A Proposed Mail Protocol," NIC 17140, RFC 524,
        13-Jun-73.
        Crocker, D. "Thoughts on the Mail Protocol Proposed in RFC
        524," NIC 17644, RFC 539, 7-July-73.
        White, J. "Response to Critiques of the Proposed Mail
        Protocol," NIC 17993, RFC 555, 27-July-73.
     People:
        Jim White at SRI-ARC (WHITE@SRI-ARC)
        Postel at Sri-ARC (POSTEL@SIR-ARC)
     Schedule:



     Recent developments:
  RJE - Remote Job Entry
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        Bressler, B. "Remote Job Entry Protocol," RFC 407, NIC
        12112, 16-Oct-72
        Krilanovich, M. "Announcement of RJS at UCSB," RFC 436, NIC
        13700, 10-Jan-73.
     People:
     Schedule:
     Recent developments:
  RJS - CCNs Remote Job Service
     Contact:
        Robert Braden at UCLA-CCN (BRADEN@UCLA-CCN)
     Documents:
        Braden, R. "Interim NETRJS Specification," RFC 18@ nic
        July-71.
        Braden, R. "Update on NETRJS," RFC 599, NIC 20854, 13-Dec-
        73.
     People:
        Robert Braden (BRADEN@UCLA-CCN)
        Steve Wolfe (WOLFE@UCLAL-CCN)
     Schedule:
     Recent developments:





  Graphics
     Contact:
        Robert Sproull (SPROULL@PARC-MAXC)
     Documents:
        Sproull, R, and E. Thomas. "A Networks Graphics Protocol,"
        NIC 24308, 16-Aug-74.
     People:
        Robert Sproull (SPROULL@PARC-MAXC)
        Elaine Thomas (Thomas@MIT-Multics)
        James Michener at MIT-DMS (JCM@MIT-DMS)
     Schedule:
     Recent developments:
        New document available from Robert Sproull.
  Data Reconfiguration Service
     Contact:
        Jon Postel at SRI-ARC (POSTEL@SRI-ARC)
     Documents:
        Anderson, B. "Status Report on Proposed Data Reconfiguration
        Service," NIC 6715, RFC 138, 28-April-71.
        Feah, "Data Reconfiguration Service at UCSB," RFC 437, NIC
        13701, 30-June-74.
     People:
     Schedule:
     Recent developments:





  RSEXEC
     Contact:
        Thomas, Bob. (BTHOMAS@BBN)
     Documents:
     People:
     Schedule:
     Recent developments:
  Line Processor Protocol
     Contact:
        Don Andrews at SRI-ARC (ANDREWS@SRI-ARC)
     Documents:
        [SRI-ARC] <hardy>1pprot.nls
        [SRI-ARC] <hardy>prot.txt
     People:
        Martin Hardy at SRI-ARC (HARDY@SRI-ARC)
        Don Andrews at Sri-ARC (ANDREWS@SRI-ARC)
     Schedule:
     Recent developments:

PROGRAMS

  Neted - Network Standard Editor [Official]
     Contact:
        Michael Padlipsky (MAP@CASE-10)
     Documents:
        Padlipsky, M. "NETED: A Common Editor for the ARPA Network,"
        RFC 569, NIC 18972, 15-Oct-73.



     People:
        Padlipsky at MITRE (MAP@CASE-10)
        Postel at SRI-ARC (POSTEL@SRI-ARC0
        Hathaway at AMES (HATHAWAY@AMES-67)
     Schedule:
     Recent developments:

NATIONAL SOFTWARE WORKS

The National Software Works is developing a set of protocols for its use of the ARPA Network, other uses of these protocols is encouraged.

The procedure call protocol is intended to facilitate the sharing of resources in the network at the subroutine level. The procedure call protocol will be used to split nls into a front end and back end components. Procedure call protocol is also to be used in the nsw as the basis for communication between the works manager, the tool bearing hosts, and front desk procedure packages.

The documents cited below give a view of the Procedure Call Protocol and its use.

  Contact:
     Jim White (WHITE@SRI-ARC)
     Jon Postel (POSTEL@SIR-ARC)
  Documents:
     These documents are the second published version of the
     Procedure Call Protocol and NSW protocol - PCP/NSW Version 2.
     Version 2 is SUBSTANTIALLY different than Version 1; it and all
     intermediate, informally distributed PCP/NSW documents are
     obsoleted by this release.
     The first document, PCP, is the place the interested ready
     should start.  It gives the required motivation for the use
     Protocol and states the substance of the Protocol proper.  The
     ready may then, if he chooses, read the next three documents:
     PIP, PSP, and PMP.  The latter has the most to offer the casual
     reader; the programmer faced with coding in the PCP environment
     should ready all three.  The next three documents - PCPFMT,



     PCPHST, and PCPFRK - are of interest only to the PCP
     implementer.  The next document - HOST - is a preliminary
     thought about how the NSW might use the standard HOST-HOST
     protocol NCP.  The last four documents - EXEC, FILE, BATCH, and
     LLDBUG - describe procedure packages needed to carry out NSW
     functions, but such packages may well be useful in other
     contexts.
     Version 2 consists of the following documents.  Each is
     available online in two forms: as an NLS file and as a
     formatted text file.  The journal number (e.g., 24459) refers
     to the former, of course and the pathname (e.g., [SRI-ARI]
     <NLS> PCP.TXT) to the latter, accessible via FTP using
     USER=ANONYMOUS and PASSWORD=GUEST (no account required).
     Hardcopy is being forwarded by US Mail to all those who have
     expressed an interest in PCP.  If you don't receive a copy and
     would like one of this and/or future releases, send a note to
     that effect to WHITE@SRI-ARC:
        PCP (24459,) "The Procedure Call Protocol"
           This document describes the virtual programming
           environment provided by PCP, and the inter-process
           exchanges that implement it.
           Pathname: [SRI-ARC] <NLS>PCP.TXT
        PIP (24460,) "The Procedure Interface Package"
           This document describes a packages that runs in the
           setting provided by PCP and that serves as a procedure-
           call-level interface to PCP proper.  It includes
           procedures for calling, resuming, interrupting, and
           aborting remote procedures.
           Pathname: [SRI-ARC] <NLS>PIP.TXT
        PSP (24461,) "The PCP Support Packages"
           This document describes a package that runs in the
           setting provided by PCP and that augments PCP proper,
           largely in the area of data store manipulation.  It
           includes procedures for obtaining access to groups of
           remote procedures and data stores, manipulating remote
           data stores, and creating temporary ones.
           Pathname: [SRI-ARC] <NLS>PSP.TXT




        PMP (24462,) "The Process Management Package"
           This document describes a package that runs in the
           setting provided by PCP and that provides the necessary
           tools for interconnecting two or more processes to form a
           multi-process system (e.g., NSW).  It includes procedures
           for creating, deleting, logically and physically
           interconnecting processes, and for allocating and
           releasing processors.
           Pathname: [SRI-ARC] <NLS>PMP.TXT
        PCPFMT (24576,) "PCP Data Structure Formats"
           This document defines formats for PCP data structures,
           each of which is appropriate for one or more physical
           channel types.
           Pathname: [SRI-ARC] <NLS>POPFMT.TXT
        PCPHST (24577,) "PCP ARPANET Inter-Host IPC Implementation"
           This document defines an implementation, appropriate for
           mediating communication between Tenex folks, of the IPC
           primitives required by PCP.
           Pathname: [SRI-ARC] <NLS.PCPHST.TXT
        PCPFRK (24578,) "PCP Tenex Inter-Fork IPC Implementation"
           This document defines an implementation, appropriate for
           mediating communication between processes on different
           hosts within the ARPANET, of the IPC primitives required
           by PCP.
           Pathname: [SRI-ARC] <NLS.PCPFRK.TXT
        HOST (24581,) "NSW Host Protocol"
           This document describes the host level protocol used in
           the NSW.  The protocol is a slightly constrained version
           of the standard ARPANET host to host protocol.  The
           constraints affect the allocation, RFNM wait, and
           retransmission policies.
           Pathname: [SRI-ARC] <NLS>HOST.TXT




        EXEC (24580,) "The Executive Package"
           This document describes a package that runs in the
           setting provided by PCP.  It includes procedures and data
           stores for user identification, accounting, and usage
           information.
           Pathname: [SRI-ARC] <NLS> EXEC.TXT
        FILE (24582,) "The File Package"
           This document describes a package that runs in the
           setting provided by PCP.  It includes procedures and data
           stores for opening, closing, and listing directories, for
           creating, deleting, and renaming files, and for
           transferring files and file elements between processes.
           Pathname: [SRI-ARC] <NLS>FILE.TXT
        BATCH (24583,) "The Batch Job Package"
           This document describes a package that runs in the
           setting provided by PCP.  It includes procedures for
           creating and deleting batch jobs, obtaining the status of
           a batch job, and communicating with the operator of a
           batch processing host.  This package is implemented at
           the host that provides the batch processing facility.
           Pathname: [SRI-ARC] <NLS>BATCH.TXT
        LLDBUG (24579,) "The Low-Level Debug Package"
           This document describes a package that runs in the
           setting provided by PCP.  It includes procedures for a
           remote process to debug at the assembly-language level,
           any process known to the local process.  The package
           contains procedures for manipulating and searching the
           process' address space, for manipulating and searching
           its symbol tables, and for setting and removing
           breakpoints from its address space.  Its data stores hold
           process characteristics and state information, and the
           contents of program symbol tables.
           Pathname: [SRI-ARC] <NLS>LLDBUG.TXT
     People:




     Schedule:
        A demonstration of the National Software Works concept is to
        be performed in July 1975.
     Recent developments:
        The set of documents cited above is available.