rfc990.txt

RFC 相关的技术文档

                             Class D Address

      Note:  No addresses are allowed with the four highest-order bits
      set to 1-1-1-1.  These addresses, called "class E", are reserved.

   One commonly used notation for internet host addresses divides the
   32-bit address into four 8-bit fields and specifies the value of each
   field as a decimal number with the fields separated by periods.  This
   is called the "dotted decimal" notation.  For example, the internet
   address of B.ISI.EDU in dotted decimal is 010.003.000.052, or
   10.3.0.52.

   The dotted decimal notation will be used in the listing of assigned
   network numbers.  The class A networks will have nnn.rrr.rrr.rrr, the
   class B networks will have nnn.nnn.rrr.rrr, and the class C networks
   will have nnn.nnn.nnn.rrr, where nnn represents part or all of a
   network number and rrr represents part or all of a local address.

   There are four catagories of users of Internet Addresses: Research,
   Defense, Government (Non-Defense), and Commercial.  To reflect the
   allocation of network identifiers among the categories, a
   one-character code is placed to the left of the network number: R for
   Research, D for Defense, G for Government, and C for Commercial (see
   Appendix A for further details on this division of the network
   identification).

   Network numbers are assigned for networks that are connected to the
   ARPA-Internet and DDN-Internet, and for independent networks that use
   the IP family protocols (these are usually commercial).  These
   independent networks are marked with an asterisk preceding the
   number.

   The administrators of independent networks must apply separately for
   permission to interconnect their network with either the
   ARPA-Internet of the DDN-Internet.  Independent networks should not
   be listed in the working tables of either the ARPA-Internet or
   DDN-Internet hosts or gateways.



Reynolds & Postel                                               [Page 5]



RFC 990                                                    November 1986
Network Numbers


   For various reasons, the assigned numbers of networks are sometimes
   changed.  To ease the transition the old number will be listed for a
   transition period as well.  These "old number" entries will be marked
   with a "T" following the number and preceding the name, and the
   network name will be suffixed "-TEMP".

   Special Addresses:

      In certain contexts, it is useful to have fixed addresses with
      functional significance rather than as identifiers of specific
      hosts.

         The address zero is to be interpreted as meaning "this", as in
         "this network".

            For example, the address 0.0.0.37 could be interpreted as
            meaning host 37 on this network.

         The address of all ones are to be interpreted as meaning "all",
         as in "all hosts".

            For example, the address 128.9.255.255 could be interpreted
            as meaning all hosts on the network 128.9.

         The class A network number 127 is assigned the "loopback"
         function, that is, a datagram sent by a higher level protocol
         to a network 127 address should loop back inside the host.  No
         datagram "sent" to a network 127 address should ever appear on
         any network anywhere.




















Reynolds & Postel                                               [Page 6]



RFC 990                                                    November 1986
Network Numbers


   Assigned Network Numbers

   Class A Networks

      * Internet Address  Name          Network               References
      - ----------------  ----          -------               ----------
        000.rrr.rrr.rrr                 Reserved                   [JBP]
      R 004.rrr.rrr.rrr   SATNET        Atlantic Satellite Network [SHB]
      D 006.rrr.rrr.rrr T YPG-NET-TEMP  Yuma Proving Grounds    [10,BWA]
      D 007.rrr.rrr.rrr T EDN-TEMP      DCEC EDN                   [EC5]
      R 008.rrr.rrr.rrr T BBN-NET-TEMP  BBN Network               [JSG5]
      R 010.rrr.rrr.rrr   ARPANET       ARPANET                 [10,SA2]
      D 011.rrr.rrr.rrr   DODIIS        DoD INTEL INFO SYS         [AY7]
      C 012.rrr.rrr.rrr   ATT           ATT, Bell Labs            [MH12]
      C 013.rrr.rrr.rrr   XEROX-NET     XEROX Internet        [129,JNL1]
      C 014.rrr.rrr.rrr   PDN           Public Data Network       [REK4]
      R*015.rrr.rrr.rrr   HP-INTERNET   Hewlett-Packard-Internet   [BXR]
      R 018.rrr.rrr.rrr T MIT-TEMP      MIT Network        [23,113,DDC1]
      D 021.rrr.rrr.rrr   DDN-RVN       DDN-RVN                    [MLC]
      D 022.rrr.rrr.rrr   DISNET        DISNET                    [FLM2]
      D 023.rrr.rrr.rrr   DDN-TC-NET    DDN-TestCell-Network      [DH17]
      R 025.rrr.rrr.rrr   RSRE-EXP      RSRE                      [RNM1]
      D 026.rrr.rrr.rrr   MILNET        MILNET                    [FLM2]
      R 027.rrr.rrr.rrr T NOSC-LCCN-TEMPNOSC / LCCN                [RH6]
      R 028.rrr.rrr.rrr   WIDEBAND      Wide Band Satellite Net   [CJW2]
      D 029.rrr.rrr.rrr T MILX25-TEMP   MILNET X.25 Temp           [MLC]
      D 030.rrr.rrr.rrr T ARPAX25-TEMP  ARPA X.25 Temp             [MLC]
      G 031.rrr.rrr.rrr   UCDLA-NET     UCDLA-CATALOG-NET          [CXL]
      R 032.rrr.rrr.rrr   UCL-TAC       UCL TAC                     [PK]
      R 035.rrr.rrr.rrr   MERIT         MERIT COMPUTER NETWK       [HWB]
      R 036.rrr.rrr.rrr T SU-NET-TEMP   Stanford University Network[PA5]
      R 039.rrr.rrr.rrr T SRINET-TEMP   SRI Local Network         [GEOF]
      R 041.rrr.rrr.rrr   BBN-TEST-A    BBN-GATE-TEST-A            [RH6]
      R 044.rrr.rrr.rrr   AMPRNET       Amateur Radio Experiment Net[HM]
        001.rrr.rrr.rrr-003.rrr.rrr.rrr Unassigned                 [JBP]
        005.rrr.rrr.rrr   Unassigned    Unassigned                 [JBP]
        009.rrr.rrr.rrr   Unassigned    Unassigned                 [JBP]
        016.rrr.rrr.rrr-017.rrr.rrr.rrr Unassigned                 [JBP]
        019.rrr.rrr.rrr-020.rrr.rrr.rrr Unassigned                 [JBP]
        024.rrr.rrr.rrr   Unassigned    Unassigned                 [JBP]
        033.rrr.rrr.rrr-034.rrr.rrr.rrr Unassigned                 [JBP]
        037.rrr.rrr.rrr-038.rrr.rrr.rrr Unassigned                 [JBP]
        040.rrr.rrr.rrr   Unassigned    Unassigned                 [JBP]
        042.rrr.rrr.rrr-043.rrr.rrr.rrr Unassigned                 [JBP]
        045.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned                 [JBP]
      R 127.rrr.rrr.rrr                 Loopback                   [JBP]



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RFC 990                                                    November 1986
Network Numbers


   Class B Networks

      * Internet Address  Name          Network               References
      - ----------------  ----          -------               ----------
        128.000.rrr.rrr                 Reserved                   [JBP]
      R 128.001.rrr.rrr   BBN-TEST-B    BBN-GATE-TEST-B            [RH6]
      R 128.002.rrr.rrr   CMU-NET       CMU-Ethernet              [HDW2]
      R 128.003.rrr.rrr   LBL-CSAM      LBL-CSAM-RESEARCH         [JS38]
      R 128.004.rrr.rrr   DCNET         LINKABIT DCNET         [78,DLM1]
      R 128.005.rrr.rrr   FORDNET       FORD DCNET             [78,DLM1]
      R 128.006.rrr.rrr   RUTGERS       RUTGERS                   [CLH3]
      R 128.007.rrr.rrr   DFVLR         DFVLR DCNET Network        [GB7]
      R 128.008.rrr.rrr   UMDNET        Univ of Maryland DCNET [78,DLM1]
      R 128.009.rrr.rrr   ISI-NET       USC-ISI Local Network      [CMR]
      R 128.010.rrr.rrr   PURDUE-CS-EN  Purdue Computer Science    [CAK]
      R 128.011.rrr.rrr   BBN-CRONUS    BBN DOS Project         [72,WXM]
      R 128.012.rrr.rrr   SU-NET        Stanford University Net    [LB3]
      D 128.013.rrr.rrr   MATNET        Mobile Access Terminal Net [SHB]
      R 128.014.rrr.rrr   BBN-SAT-TEST  BBN SATNET Test Net        [SHB]
      R 128.015.rrr.rrr   S1NET         LLL-S1-NET                [EAK1]
      R 128.016.rrr.rrr   UCLNET        University College London   [PK]
      D 128.017.rrr.rrr   MATNET-ALT    Mobile Access Terminal Alt [SHB]
      R 128.018.rrr.rrr   SRINET        SRI Local Network         [GEOF]
      D 128.019.rrr.rrr   EDN           DCEC EDN                   [EC5]
      D 128.020.rrr.rrr   BRLNET        BRLNET                 [10,MJM2]
      R 128.021.rrr.rrr   SF-PR-1       SF-1 Packet Radio Network  [JEM]
      R 128.022.rrr.rrr   SF-PR-2       SF-2 Packet Radio Network  [JEM]
      R 128.023.rrr.rrr   BBN-PR        BBN Packet Radio Network  [JAW3]
      R 128.024.rrr.rrr   ROCKWELL-PR   Rockwell Packet Radio Net  [EHP]
      D 128.025.rrr.rrr   BRAGG-PR      Ft. Bragg Packet Radio Net [JEM]
      D 128.026.rrr.rrr   SAC-PR        SAC Packet Radio Network   [BG5]
      D 128.027.rrr.rrr   DEMO-PR-1     Demo-1 Packet Radio Network[LCS]
      D 128.028.rrr.rrr   C3-PR-TEMP    Testbed Development PR NET [BG5]
      R 128.029.rrr.rrr   MITRE         MITRE Cablenet         [121,TML]
      R 128.030.rrr.rrr   MIT-NET       MIT Local Network         [DDC1]
      R 128.031.rrr.rrr   MIT-RES       MIT Research Network      [DDC1]
      R 128.032.rrr.rrr   UCB-ETHER     UC Berkeley Ethernet      [DAM1]
      R 128.033.rrr.rrr   BBN-NET       BBN Network               [JSG5]
      R 128.034.rrr.rrr   NOSC-LCCN     NOSC / LCCN                [RH6]
      R 128.035.rrr.rrr   CISLTESTNET1  Honeywell          [60,61,JLM23]
      R 128.036.rrr.rrr   YALE-NET      YALE NET               [129,JO5]
      D 128.037.rrr.rrr   YPG-NET       Yuma Proving Grounds    [10,BWA]
      D 128.038.rrr.rrr   NSWC-NET      NSWC Local Host Net       [RLH2]
      R 128.039.rrr.rrr   NTANET        NDRE-TIU                   [PS3]
      R 128.040.rrr.rrr   UCL-NET-A     UCL                        [RC7]
      R 128.041.rrr.rrr   UCL-NET-B     UCL                        [RC7]
      R 128.042.rrr.rrr   RICE-NET      Rice University        [129,PGM]


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RFC 990                                                    November 1986
Network Numbers


      R 128.043.rrr.rrr   DRENET        Canada REF ARPANET     [10,JR17]
      D 128.044.rrr.rrr   WSMR-NET      White Sands Network       [CAS1]
      C 128.045.rrr.rrr   DEC-WRL-NET   DEC WRL Network       [129,RKJ2]
      R 128.046.rrr.rrr   PURDUE-NET    Purdue Campus Network      [CAK]
      D 128.047.rrr.rrr   TACTNET       Tactical Packet Net      [9,KTP]
      G 128.048.rrr.rrr   UCDLA-NET-B   UCDLA-Network-B         [10,CXL]
      R 128.049.rrr.rrr   NOSC-ETHER    NOSC Ethernet         [129,RLB3]
      G 128.050.rrr.rrr   COINS         COINS On-Line Intel Net   [RLS6]
      G 128.051.rrr.rrr   COINSTNET     COINS TEST NETWORK        [RLS6]
      R 128.052.rrr.rrr   MIT-AI-NET    MIT AI NET             [129,MDC]
      R 128.053.rrr.rrr   SAC-PR-2      SAC PRNET Number 2         [BG5]
      R 128.054.rrr.rrr   UCSD          UC San Diego Network  [129,GH29]
      R*128.055.rrr.rrr   MFENET        LLNL MFE Network       [119,DRP]
      D 128.056.rrr.rrr   USNA-NET      US Naval Academy Network   [TXS]
      D 128.057.rrr.rrr   DEMO-PR-2     Demo-2 Packet Radio Net    [LCS]
      C*128.058.rrr.rrr   SPAR          Schlumberger PA Net    [129,RXB]
      R 128.059.rrr.rrr   CU-NET        Columbia University    [129,LH2]
      D 128.060.rrr.rrr   NRL-LAN       NRL Lab Area Net           [WF3]
      R*128.061.rrr.rrr   GATECH        Georgia Tech           [129,GXS]
      R 128.062.rrr.rrr   MCC-NET       MCC Corporate Net      [129,CBD]
      R 128.063.rrr.rrr   BRL-SUBNET    BRL-SUBNET-EXP            [RBN1]
      R 128.064.rrr.rrr-128.079.rrr.rrr Net Dynamics Exp           [ZSU]
      D 128.080.rrr.rrr   CECOMNET      CECOM EPR NET             [PFS2]
      R 128.081.rrr.rrr   SYMBOLICS     SYMBOLICS              [129,CH2]