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-
-
- Network Working Group J. Postel
- Request for Comments: 840 ISI
- April 1983
-
- Official Protocols
-
-
- This RFC identifies the documents specifying the official protocols used
- in the Internet. Annotations identify 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 these are noted here. In particular, the
- mail protocols have been revised and issued as a volume titled "Internet
- Mail Protocols" dated November 1982. There is a volume of protocol
- related information called the Internet Protocol Implementers Guide
- (IPIG) dated August 1982. A few of the protocols (in particular the
- Telnet Options) have not been revised for many years, these are found in
- the old ARPANET Protocol Handbook (APH) dated January 1978.
-
- 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.
-
- The dependencies indicate what other protocols are called upon by
- this protocol.
-
- The contact indicates a person who can answer questions about the
- protocol.
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 1]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- In particular, the status may need some further clarification:
-
- 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.
-
- 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:
-
- DEPENDENCIES:
-
- CONTACT: Postel@USC-ISIF
-
-
-
-
-
-
- Postel [Page 2]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Network Level
-
- Internet Protocol (IP)
-
- STATUS: Required
-
- SPECIFICATION: RFC 791 (in IPTW)
-
- COMMENTS:
-
- 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.
-
- 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
-
- DEPENDENCIES:
-
- CONTACT: Postel@USC-ISIF
-
-
-
-
-
-
-
-
-
-
- Postel [Page 3]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Internet Control Message Protocol (ICMP)
-
- STATUS: Required
-
- SPECIFICATION: RFC 792 (in IPTW)
-
- COMMENTS:
-
- 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.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Host Level
-
- User Datagram Protocol (UDP)
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 768 (in IPTW)
-
- COMMENTS:
-
- 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-ISIF
-
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 4]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Transmission Control Protocol (TCP)
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 793 (in IPTW)
-
- COMMENTS:
-
- 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.
-
- 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 default should be established more clearly. The default is
- based on the default maximum Internet Datagram size which is
- 576 octets counting the IP and TCP headers. The option counts
- only the segment data. For each of IP and TCP the minimum
- header is 20 octets and the maximum header is 60 octets. So the
- default maximum data segment is could be anywhere from 456 to
- 536 octets. The current proposal is to set it at 536 data
- octets.
-
- 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,
-
-
- Postel [Page 5]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- 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
-
- RFC 817 (in IPIG) - Modularity and Efficiency in Protocol
- Implementation
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Host Monitoring Protocol (HMP)
-
- STATUS: Elective
-
- SPECIFICATION: IEN 197
-
- COMMENTS:
-
- This is a good tool for debuging protocol implementations in
- small remotely located computers.
-
- This protocol is used to monitor Internet gateways and the
- TACs.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Hinden@BBN-UNIX
-
-
- Postel [Page 6]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Cross Net Debugger (XNET)
-
- STATUS: Elective
-
- SPECIFICATION: IEN 158
-
- COMMENTS:
-
- This specification should be updated and reissued as an RFC.
-
- OTHER REFERENCES:
-
- RFC 643
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Exterior Gateway Protocol (EGP)
-
- STATUS: Experimental
-
- SPECIFICATION: RFC 827
-
- COMMENTS:
-
- Please discuss any plans for implementation or use of this
- protocol with the contact.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Postel@USC-ISIF
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 7]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Gateway Gateway Protocol (GGP)
-
- STATUS: Experimental
-
- SPECIFICATION: RFC 823
-
- COMMENTS:
-
- Please discuss any plans for implementation or use of this
- protocol with the contact.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Internet Protocol
-
- CONTACT: Brescia@BBN-UNIX
-
- Multiplexing Protocol
-
- STATUS: Experimental
-
- SPECIFICATION: IEN 90
-
- COMMENTS:
-
- 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-ISIF
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 8]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Stream Protocol (ST)
-
- STATUS: Experimental
-
- SPECIFICATION: IEN 119
-
- COMMENTS:
-
- 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: Forgie@BBN
-
- Network Voice Protocol (NVP-II)
-
- STATUS: Experimental
-
- SPECIFICATION: RFC xxx
-
- COMMENTS:
-
- 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:
-
- DEPENDENCIES: Internet Protocol, Stream Protocol
-
- CONTACT: Casner@USC-ISIB
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 9]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Application Level
-
- Telnet Protocol (TELNET)
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 764 (in IPTW)
-
- COMMENTS:
-
- A few minor typographical errors should be corrected and some
- clarification of the SYNCH mechanism should be made.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Telnet Options (TELNET)
-
- Number Name RFC NIC APH USE
- ------ ------------------------------------ --- ----- --- ---
- 0 Binary Transmission ... 15389 yes yes
- 1 Echo ... 15390 yes yes
- 2 Reconnection ... 15391 yes no
- 3 Suppress Go Ahead ... 15392 yes yes
- 4 Approximate Message Size Negotiation ... 15393 yes no
- 5 Status 651 31154 yes yes
- 6 Timing Mark ... 16238 yes yes
- 7 Remote Controlled Trans and Echo 726 39237 yes no
- 8 Output Line Width ... 20196 yes no
- 9 Output Page Size ... 20197 yes no
- 10 Output Carriage-Return Disposition 652 31155 yes no
- 11 Output Horizontal Tabstops 653 31156 yes no
- 12 Output Horizontal Tab Disposition 654 31157 yes no
- 13 Output Formfeed Disposition 655 31158 yes no
- 14 Output Vertical Tabstops 656 31159 yes no
- 15 Output Vertical Tab Disposition 657 31160 yes no
- 16 Output Linefeed Disposition 658 31161 yes no
- 17 Extended ASCII 698 32964 yes no
- 18 Logout 727 40025 yes no
- 19 Byte Macro 735 42083 yes no
- 20 Data Entry Terminal 732 41762 yes no
- 21 SUPDUP 734 736 42213 yes no
- 22 SUPDUP Output 749 45449 no no
- 23 Send Location 779 ----- no no
- 255 Extended-Options-List ... 16239 yes yes
-
-
-
- Postel [Page 10]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- STATUS: Elective
-
- SPECIFICATION: (in APH)
-
- COMMENTS:
-
- There is an open question about some of these. Most of the
- options are implemented by so few hosts that perhaps they
- should be eliminated. These should all be studied and the
- useful ones reissued as RFCs.
-
- The last column (USE) of the table above indicates which
- options are in general use.
-
- The following are recommended: Binary Transmission, Echo,
- Suppress Go Ahead, Status, Timing Mark, and Extended Options
- List.
-
- Many of these must be revised for use with TCP.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Telnet
-
- CONTACT: Postel@USC-ISIF
-
- File Transfer Protocol (FTP)
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 765 (in IPTW)
-
- COMMENTS:
-
- There are a number of minor corrections to be made. A major
- change is the deletion of the mail commands, and a major
- clarification is needed in the discussion of the management of
- the data connection. Also, a suggestion has been made to
- include some directory manipulation commands (RFC 775).
-
- Eventhough the MAIL features are defined in this document, they
- are not to be used. The SMTP protocol is to be used for all
- mail service in the Internet.
-
- Data Connection Management:
-
- a. Default Data Connection Ports: All FTP implementations
- must support use of the default data connection ports, and
- only the User-PI may initiate the use of non-default ports.
-
-
- Postel [Page 11]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- b. Negotiating Non-Default Data Ports: The User-PI may
- specify a non-default user side data port with the PORT
- command. The User-PI may request the server side to
- identify a non-default server side data port with the PASV
- command. Since a connection is defined by the pair of
- addresses, either of these actions is enough to get a
- different data connection, still it is permitted to do both
- commands to use new ports on both ends of the data
- connection.
-
- c. Reuse of the Data Connection: When using the stream
- mode of data transfer the end of the file must be indicated
- by closing the connection. This causes a problem if
- multiple files are to be transfered in the session, due to
- need for TCP to hold the connection record for a time out
- period to guarantee the reliable communication. Thus the
- connection can not be reopened at once.
-
- There are two solutions to this problem. The first is to
- negotiate a non-default port (as in (b) above). The
- second is to use another transfer mode.
-
- A comment on transfer modes. The stream transfer mode is
- inherently unreliable, since one can not determine if the
- connection closed prematurely or not. The other transfer
- modes (Block, Compressed) do not close the connection to
- indicate the end of file. They have enough FTP encoding
- that the data connection can be parsed to determine the
- end of the file. Thus using these modes one can leave
- the data connection open for multiple file transfers.
-
- Why this was not a problem with the old NCP FTP:
-
- The NCP was designed with only the ARPANET in mind.
- The ARPANET provides very reliable service, and the
- NCP counted on it. If any packet of data from an NCP
- connection were lost or damaged by the network the NCP
- could not recover. It is a tribute to the ARPANET
- designers that the NCP FTP worked so well.
-
- The TCP is designed to provide reliable connections
- over many different types of networks and
- interconnections of networks. TCP must cope with a
- set of networks that can not promise to work as well
- as the ARPANET. TCP must make its own provisions for
- end-to-end recovery from lost or damaged packets.
- This leads to the need for the connection phase-down
- time-out. The NCP never had to deal with
- acknowledgements or retransmissions or many other
-
-
- Postel [Page 12]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- things the TCP must do to make connection reliable in
- a more complex world.
-
- LIST and NLST:
-
- There is some confusion about the LIST an NLST commands, and
- what is appropriate to return. Some clarification and
- motivation for these commands should be added to the
- specification.
-
- OTHER REFERENCES:
-
- RFC 678 - Document File Format Standards
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Trivial File Transfer Protocol (TFTP)
-
- STATUS: Elective
-
- SPECIFICATION: RFC 783 (in IPTW)
-
- COMMENTS:
-
- No known problems with this specification. This is in use in
- several local networks.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Simple Mail Transfer Protocol (SMTP)
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 821
-
- COMMENTS:
-
- 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
-
-
-
- Postel [Page 13]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- implementations. Some documentation of these problems can be
- found in the file [ISIF]<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.
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Remote Job Entry (RJE)
-
- STATUS: Elective
-
- SPECIFICATION: RFC 407 (in APH)
-
- COMMENTS:
-
- Some changes needed for use with TCP.
-
- No known active implementations.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: File Transfer Protocol
- Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 14]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Remote Job Service (NETRJS)
-
- STATUS: Elective
-
- SPECIFICATION: RFC 740 (in APH)
-
- COMMENTS:
-
- 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@USC-ISIA
-
- Remote Telnet Service
-
- STATUS: Elective
-
- SPECIFICATION: RFC 818
-
- COMMENTS:
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Telnet, Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Graphics Protocol
-
- STATUS: Elective
-
- SPECIFICATION: NIC 24308 (in APH)
-
- COMMENTS:
-
- Very minor changes needed for use with TCP.
-
- No known active implementations.
-
- OTHER REFERENCES:
-
-
-
- Postel [Page 15]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- DEPENDENCIES: Telnet, Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Echo Protocol
-
- STATUS: Recommended
-
- SPECIFICATION: RFC 347
-
- COMMENTS:
-
- This specification should be revised for use with TCP and
- reissued.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Discard Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 348
-
- COMMENTS:
-
- This specification should be revised for use with TCP and
- reissued.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 16]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- Character Generator Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 429
-
- COMMENTS:
-
- This specification should be revised for use with TCP and
- reissued.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Quote of the Day Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC xxx
-
- COMMENTS:
-
- Open a connection to this server, it sends you a quote (as a
- character string), and closes the connection. This should be
- described in an RFC.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Active Users Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC xxx
-
- COMMENTS:
-
- Open a connection to this server, it sends you a list of the
- currently logged in users (as a character string), and closes
- the connection. This should be described in an RFC.
-
-
-
- Postel [Page 17]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Finger Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 742 (in APH)
-
- COMMENTS:
-
- Some extensions have been suggested.
-
- Some changes are are needed for TCP.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Postel@USC-ISIF
-
- NICNAME Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 812 (in IPTW)
-
- COMMENTS:
-
- Accesses the ARPANET Directory database.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Feinler@SRI-NIC
-
-
-
-
-
-
-
-
-
-
-
- Postel [Page 18]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- HOSTNAME Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 811 (in IPTW)
-
- COMMENTS:
-
- Accesses the Registered Internet Hosts database (HOSTS.TXT).
-
- OTHER REFERENCES:
-
- RFC 810 - Host Table Specification
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Feinler@SRI-NIC
-
- Host Name Server Protocol
-
- STATUS: Experimental
-
- SPECIFICATION: IEN 116 (in IPTW)
-
- COMMENTS:
-
- 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.
-
- Work is in progress on a significant revision. 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-ISIF
-
-
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- Postel [Page 19]
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- RFC 840 April 1983
- Official Protocols
-
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- CSNET Mailbox Name Server Protocol
-
- STATUS: Experimental
-
- SPECIFICATION: CS-DN-2
-
- COMMENTS:
-
- Please discuss any plans for implementation or use of this
- protocol with the contact.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Solomon@UWISC
-
- Daytime Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC xxx
-
- COMMENTS:
-
- Open a connection to this server, it sends you the date and
- time (as a character string), and closes the connection. This
- should be described in an RFC.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- Time Server Protocol
-
- STATUS: Recommended
-
- SPECIFICATION: IEN 142
-
- COMMENTS:
-
- Open a connection to this server, it sends you the date and
- time (as a 32-bit number), and closes the connection. Or send
- a user datagram and it send back a datagram containing the date
- and time (as a 32-bit number).
-
-
-
- Postel [Page 20]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- No known problems. Specification should be reissued as an RFC.
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
- or User Datagram Protocol
-
- CONTACT: Postel@USC-ISIF
-
- DCNET Time Server Protocol (Internet Clock Service)
-
- STATUS: Elective
-
- SPECIFICATION: RFC 778
-
- COMMENTS:
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Internet Control Message Protocol
-
- CONTACT: Mills@LINKABIT-DCN6
-
- SUPDUP Protocol
-
- STATUS: Elective
-
- SPECIFICATION: RFC 734 (in APH)
-
- COMMENTS:
-
- OTHER REFERENCES:
-
- DEPENDENCIES: Transmission Control Protocol
-
- CONTACT: Admin.MRC@SU-SCORE
-
- Internet Message Protocol (MPM)
-
- STATUS: Experimental
-
- SPECIFICATION: RFC 753
-
- COMMENTS:
-
- This is an experimental multimedia mail transfer protocol. The
- implementation is called a Message Processing Module or MPM.
-
-
-
-
- Postel [Page 21]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- 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-ISIF
-
- Appendices
-
- Assigned Numbers
-
- STATUS: None
-
- SPECIFICATION: RFC 820
-
- COMMENTS:
-
- Describes the fields of various protocols that are assigned
- specific values for actual use, and lists the currently
- assigned values.
-
- Issued January 1983, replaces RFC 790 in IPTW.
-
- OTHER REFERENCES:
-
- CONTACT: Postel@USC-ISIF
-
- Pre-emption
-
- STATUS: Elective
-
- SPECIFICATION: RFC 794 (in IPTW)
-
- COMMENTS:
-
- Describes how to do pre-emption of TCP connections.
-
- OTHER REFERENCES:
-
- CONTACT: Postel@USC-ISIF
-
-
-
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-
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- Postel [Page 22]
-
-
- RFC 840 April 1983
- Official Protocols
-
-
- 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-ISIF
-
- Address Mappings
-
- STATUS: None
-
- SPECIFICATION: RFC 796 (in IPTW)
-
- COMMENTS:
-
- Describes the mapping of the IP address field onto the address
- field of some specific networks.
-
- Out of date, needs revision.
-
- OTHER REFERENCES:
-
- CONTACT: Postel@USC-ISIF
-
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- Postel [Page 23]
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