rfc870.txt

RFC 相关的技术文档

Reynolds & Postel                                               [Page 7]



Assigned Numbers                                                 RFC 870
Network Numbers


   Network Totals

      Assigned for the Internet

         Class         A         B         C     Total

         Research     10        27      1055      1092

         Defense       2        10         9        21

         Commercial    2         0         2         4

         Total        14        37      1066      1117

      Allocated for Internet and Other Uses

         Class         A         B         C     Total

         Research     10        27      1055      1092

         Defense       2        10         9        21

         Commercial    2         0       770       772

         Total        14        37      1834      1885

      Maximum Allowed

         Class         A         B         C     Total

         Research      8      1024     65536     66568

         Defense      24      3072    458752    461848

         Commercial   94     12286   1572862   1585242

         Total       126     16382   2097150   2113658













Reynolds & Postel                                               [Page 8]



Assigned Numbers                                                 RFC 870
Internet Version Numbers


                   ASSIGNED INTERNET VERSION NUMBERS

   In the Internet Protocol (IP) [16,47] there is a field to identify
   the version of the internetwork general protocol.  This field is 4
   bits in size.

   Assigned Internet Version Numbers

      Decimal   Octal      Version                            References
      -------   -----      -------                            ----------
          0      0         Reserved                                [JBP]
        1-3    1-3         Unassigned                              [JBP]
          4      4         Internet Protocol                 [16,47,JBP]
          5      5         ST Datagram Mode                     [18,JWF]
       6-14   6-16         Unassigned                              [JBP]
         15     17         Reserved                                [JBP]

                   ASSIGNED INTERNET PROTOCOL NUMBERS

   In the Internet Protocol (IP) [16,47] there is a field, called
   Protocol, to identify the the next level protocol.  This is an 8 bit
   field.

   Assigned Internet Protocol Numbers

      Decimal    Octal      Protocol                          References
      -------    -----      ----------------                  ----------
           0       0         Reserved                              [JBP]
           1       1         ICMP                            [16,40,JBP]
           2       2         Unassigned                            [JBP]
           3       3         Gateway-to-Gateway                  [24,MB]
           4       4         Unassigned                            [JBP]
           5       5         Stream (ST)                        [18,JWF]
           6       6         Transmission Control (TCP)      [16,48,JBP]
           7       7         UCL                                    [PK]
           8      10         Exterior Gateway Protocol (EGP)    [53,RH6]
           9      11         Unassigned                            [JBP]
          10      12         BBN RCC Monitoring                    [SGC]
          11      13         NVP                                [12,SC3]
          12      14         PUP                                [6,EAT3]
       13-14   15-16         Unassigned                            [JBP]
          15      17         Cross Net Debugger (XNET)         [23,JFH2]
          16      20         Chaos Stream                          [NC3]
          17      21         User Datagram (UDP)             [16,46,JBP]
          18      22         Multiplexing                       [13,JBP]
          19      23         DCN Measurement Subsystems           [DLM1]
          20      24         Host Monitoring (HMP)              [28,RH6]
          21      25         Packet Radio Measurement              [ZSU]


Reynolds & Postel                                               [Page 9]



Assigned Numbers                                                 RFC 870
Internet Protocol Numbers


          22      26         XEROX NS IDP                       [62,LLG]
          23      27         Trunk-1                               [BML]
          24      30         Trunk-2                               [BML]
          25      31         Leaf-1                                [BML]
          26      32         Leaf-2                                [BML]
       27-60   33-74         Unassigned                            [JBP]
          61      75         any host internal protocol            [JBP]
          62      76         CFTP                              [19,HCF2]
          63      77         any local network                     [JBP]
          64     100         SATNET and Backroom EXPAK            [DM11]
          65     101         MIT Subnet Support                    [NC3]
          66     102         MIT VAX Remote Disk Protocol          [MBG]
          67     103         Internet Pluribus Packet Core        [DM11]
          68     104         Unassigned                            [JBP]
          69     105         SATNET Monitoring                    [DM11]
          70     106         Unassigned                            [JBP]
          71     107         Internet Packet Core Utility         [DM11]
       72-75 110-113         Unassigned                            [JBP]
          76     114         Backroom SATNET Monitoring           [DM11]
          77     115         Unassigned                            [JBP]
          78     116         WIDEBAND Monitoring                  [DM11]
          79     117         WIDEBAND EXPAK                       [DM11]
      80-254 120-376         Unassigned                            [JBP]
         255     377         Reserved                              [JBP]


























Reynolds & Postel                                              [Page 10]



Assigned Numbers                                                 RFC 870
Port Numbers


                         ASSIGNED PORT NUMBERS

   Ports are used in the TCP [16,48] to name the ends of logical
   connections which carry long term conversations.  For the purpose of
   providing services to unknown callers, a service contact port is
   defined.  This list specifies the port used by the server process as
   its contact port.  The contact port is sometimes called the
   "well-known port".

   To the extent possible, these same port assignments are used with the
   UDP [16,46].

   The assigned ports use a small portion of the possible port numbers.
   The assigned ports have all except the low order eight bits cleared
   to zero.  The low order eight bits are specified here.

   Port Assignments:

      Decimal   Octal     Description                         References
      -------   -----     -----------                         ----------
      0         0         Reserved                                 [JBP]
      1-4       1-4       Unassigned                               [JBP]
      5         5         Remote Job Entry                    [8,17,JBP]
      7         7         Echo                                  [38,JBP]
      9         11        Discard                               [37,JBP]
      11        13        Active Users                          [34,JBP]
      13        15        Daytime                               [36,JBP]
      15        17        Who is up or NETSTAT                     [JBP]
      17        21        Quote of the Day                      [43,JBP]
      19        23        Character Generator                   [35,JBP]
      20        24        File Transfer (Default Data)       [16,39,JBP]
      21        25        File Transfer (Control)            [16,39,JBP]
      23        27        Telnet                                [50,JBP]
      25        31        SMTP                               [16,45,JBP]
      27        33        NSW User System FE                    [14,RHT]
      29        35        MSG ICP                               [32,RHT]
      31        37        MSG Authentication                    [32,RHT]
      33        41        Unassigned                               [JBP]
      35        43        Any Printer Server                       [JBP]
      37        45        Time                                  [49,JBP]
      39        47        Unassigned                               [JBP]
      41        51        Graphics                           [17,57,JBP]
      42        52        Host Name Server                   [16,42,JBP]
      43        53        NICNAME (WhoIs)                   [16,22,JAKE]
      44        54        MPM FLAGS Protocol                       [JBP]
      45        55        Message Processing Module (receive)   [41,JBP]
      46        56        MPM (default send)                    [41,JBP]
      47        57        NI FTP                                 [59,SK]


Reynolds & Postel                                              [Page 11]



Assigned Numbers                                                 RFC 870
Port Numbers


      49        61        Login Host Protocol                      [PXD]
      51        63        IMP Logical Address Maintenance       [30,AGM]
      53        65        Domain Name Server                       [PM1]
      55        67        ISI Graphics Language                  [5,RB6]
      57        71        Any Private Terminal Access              [JBP]
      59        73        Any Private File Service                 [JBP]
      61        75        NIMAIL                                  [3,SK]
      63        77        Unassigned                               [JBP]
      65        101       Unassigned                               [JBP]
      67        103       Datacomputer at CCA                   [10,JZS]
      69        105       Trivial File Transfer              [16,55,KRS]
      71        107       NETRJS                              [7,17,RTB]
      72        110       NETRJS                              [7,17,RTB]
      73        111       NETRJS                              [7,17,RTB]
      74        112       NETRJS                              [7,17,RTB]
      75        113       Any Private Dial Out Service             [JBP]
      77        115       Any Private RJE Service                  [JBP]
      79        117       Finger (Name)                      [17,20,KLH]
      81        121       HOSTS2 Name Server                      [EAK1]
      83        123       MIT ML Device                            [DPR]
      85        125       MIT ML Device                            [DPR]
      87        127       any terminal link                        [JBP]
      89        131       SU/MIT Telnet Gateway                    [MRC]
      91        133       MIT Dover Spooler                        [EBM]
      93        135       Device Control Protocol                  [DCT]
      95        137       SUPDUP                                [15,MRC]
      97        141       Datacomputer Status                   [10,JZS]
      99        143       Metagram Relay                          [GEOF]
      101       145       NIC Host Name Server              [16,21,JAKE]
      103       147       Unassigned                               [JBP]
      105       151       CSNET Mailbox Name Server (Program)  [56,MHS1]
      107       153       Remote Telnet Service                 [44,JBP]
      109-129   155-201   Unassigned                               [JBP]
      131       203       Datacomputer                          [10,JZS]
      132-223   204-337   Reserved                                 [JBP]
      224-241   340-361   Unassigned                               [JBP]
      243       363       Survey Measurement                      [4,AV]
      245       365       LINK                                  [9,RDB2]
      247-255   367-377   Unassigned                               [JBP]











Reynolds & Postel                                              [Page 12]



Assigned Numbers                                                 RFC 870
Autonomous System Numbers


                   ASSIGNED AUTONOMOUS SYSTEM NUMBERS

   The Exterior Gateway Protocol (EGP) [53] specifies that groups of
   gateways may form autonomous systems.  The EGP provides a 16-bit
   field for identifying such systems.  The values of this field are
   registered here.

   Autonomous System Numbers:

      Decimal   Description                                   References
      -------   -----------                                   ----------
            0   Reserved                                           [JBP]
            1   The BBN Gateways                                    [MB]
            2   The DCN Gateways                                  [DLM1]
            3   The MIT Gateways                                   [LM8]
      4-65534   Unassigned                                         [JBP]
        65535   Reserved                                           [JBP]

































Reynolds & Postel                                              [Page 13]