rfc991.txt

RFC 相关的技术文档

      CONTACT: [e-mail]





Reynolds & Postel                                              [Page 37]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


   Internet Protocol on ARPANET  ----------------------------- (IP-ARPA)

      STATUS:  Recommended

      SPECIFICATION:  BBN Report 1822

      COMMENTS:

         Describes a standard for the transmission of IP Datagrams over
         the ARPANET.

      OTHER REFERENCES: RFC 851, RFC 852, RFC 878 (in DPH), RFC 979

      CONTACT:  [e-mail]

   Internet Protocol on WBNET  --------------------------------- (IP-WB)

      STATUS:  Recommended

      SPECIFICATION:  RFC 907 (in DPH)

      COMMENTS:

         Describes a standard for the transmission of IP Datagrams over
         the Wideband Net.

         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:

      CONTACT:  [e-mail]












Reynolds & Postel                                              [Page 38]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


   Host Access Protocol  -------------------------------------- (IP-SAT)

      STATUS:  Recommended

      SPECIFICATION:  RFC 907  (in DPH)

      COMMENTS:

         Describes a standard for the transmission of IP Datagrams over
         the SATNET.

         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: [e-mail]

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

      STATUS:  Recommended

      SPECIFICATION:  RFC 877 (in DPH)

      COMMENTS:

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

      OTHER REFERENCES:

      CONTACT:  [e-mail]










Reynolds & Postel                                              [Page 39]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


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

      STATUS:  Elective

      SPECIFICATION: RFC 891 (in DPH)

      COMMENTS:

      OTHER REFERENCES:

         RFC 778 - DCNET Internet Clock Service

      CONTACT:  [e-mail]

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

      STATUS:  Recommended

      SPECIFICATION: RFC 894 (in DPH)

      COMMENTS:

      OTHER REFERENCES:  RFC 893

      CONTACT:  [e-mail]

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

      STATUS:  Recommended

      SPECIFICATION: RFC 895 (in DPH)

      COMMENTS:

      OTHER REFERENCES:

      CONTACT:  [e-mail]












Reynolds & Postel                                              [Page 40]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


   Internet Protocol on IEEE 802  ---------------------------- (IP-IEEE)

      STATUS:  Recommended

      SPECIFICATION: RFC 948 (in DPH)

      COMMENTS:

         A proposed protocol of two methods of encapsulating Internet
         Protocol (IP) datagrams on an IEEE 802.3 network.  Currently
         being revised to be generalized for all 802 networks.

         At an ad hoc special session on "IEEE 802 Networks and ARP"
         held during the TCP Vendors Workshop (August 1986), an approach
         to a consistent way to sent DOD-IP datagrams and other IP
         related protocols on 802 networks was developed.

         Due to some evolution of the IEEE 802.2 standards and the need
         to provide for a standard way to do additional DOD-IP related
         protocols (such as Address Resolution Protocol (ARP)) on IEEE
         802 networks, the following new policy is established, which
         will replace the current policy (see RFC-990 section on IEEE
         802 Numbers of Interest, and RFC-948).

         The policy is for DDN and ARPA-Internet community to use IEEE
         802.2 encapsulation on 802.3, 802.4, and 802.5 networks by
         using the SNAP with an organization code indicating that the
         following 16 bits specify the Ethertype code (where IP = 2048
         (0800 hex), see RFC-990  section on Ethernet Numbers of
         Interest).

                                                                  Header

            ...--------+--------+--------+
             MAC Header|      Length     |               802.{3/4/5} MAC
            ...--------+--------+--------+

            +--------+--------+--------+
            | Dsap=K1| Ssap=K1| control|                       802.2 SAP
            +--------+--------+--------+

            +--------+--------+---------+--------+--------+
            |protocol id or org code =K2|    Ether Type   |   802.2 SNAP
            +--------+--------+---------+--------+--------+

         The values of K1 and K2 must be assigned by the IEEE.  There is
         already assigned a value of K1 that indicates that the 5-octet


Reynolds & Postel                                              [Page 41]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


         SNAP header follows.  We can use this value.  There may be a
         value of K2 that is already assigned that indicates that the
         last two octets of the SNAP header holds the EtherType.  If so
         we may be able to use this value.

         The total length of the SAP Header and the SNAP header is
         8-octets, making the 802.2 protocol overhead come out on a nice
         octet boundary.

         K1 is 170.  The IEEE like to talk about things in bit
         transmission order and specifies this value as 01010101.  In
         big-endian order, as used in Internet specifications, this
         becomes 10101010 binary, or AA hex, or 170 decimal.

         We believe that K2 is 0 (zero).  This must be further
         investigated, but as an interim measure use K2 = 0.

      OTHER REFERENCES:

      CONTACT:  [e-mail]

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

      STATUS:  Recommended

      SPECIFICATION: RFC 950

      COMMENTS:

         This is a very important feature and should be included in all
         IP implementations.

         Specifies procedures for the use of subnets, which are logical
         sub-sections of a single Internet network.

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

      DEPENDENCIES:

      CONTACT:  [e-mail]








Reynolds & Postel                                              [Page 42]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


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

      STATUS:  Recommended

      SPECIFICATION: RFC 826  (IN DPH)

      COMMENTS:

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

      OTHER REFERENCES:

      CONTACT:  [e-mail]

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

      STATUS:  Elective

      SPECIFICATION: RFC 903 (IN DPH)

      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).

      OTHER REFERENCES:

      CONTACT:  [e-mail]

   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


Reynolds & Postel                                              [Page 43]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


      DEPENDENCIES:

      CONTACT:  [e-mail]

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

      STATUS:  Recommended

      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.

         Recommended in the sense of "if you do broadcasting at all then
         do it this way".

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

      OTHER REFERENCES:  RFC 922

      DEPENDENCIES:

      CONTACT: [e-mail]

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

      STATUS:  Recommended

      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.

         Recommended in the sense of "if you do broadcasting with
         subnets at all then do it this way".

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

      OTHER REFERENCES: RFC 919


Reynolds & Postel                                              [Page 44]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


      DEPENDENCIES:

      CONTACT: [e-mail]

   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: [e-mail]

   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:


Reynolds & Postel                                              [Page 45]



RFC 991                                                    November 1986
Official ARPA-Internet Protocols


      DEPENDENCIES:

      CONTACT: [e-mail]














































Reynolds & Postel                                              [Page 46]