rfc1296.txt

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340| H                                                         .
320| o
300| s                                                        *
280| t
260| s                                                       .
240|                                                        .
220|                                                       .
200|                                                      .
180|                                                     .
160|
140|                                                    *
120|                                                   *
100|                                                 ..
 80|                                                *
 60|                                               .
 40|                                              *
 20|                                       ..*...*
  0|...*....*......*......*.....*.*....*...
    -------------------------------------------------------------------
    8     8     8     8     8     8     8     8     8     9     9     9
    1     2     3     4     5     6     7     8     9     0     1     2
                                   Date
    "*"  = data point,  "." = estimate
This graph is a linear plot of the number of Internet hosts.



Lottor                                                          [Page 5]

RFC 1296              Internet Growth (1981-1991)           January 1992


                        Number of Internet Hosts (logarithmic)


    | 1000000
    |                                                                *.*
    |                                                        ..*.*..*
    |                                                     ...
    | 100000                                          ..**
    |                                              *.*
  H |                                          ...*
  o |                                        .*
  s | 10000                                ..
  t |                                    ..
  s |                               ....*
    |                         ...*.*
1000|                   ...*..
    |                ...
    |            ...*
    | ..*....*...
 100|.
     -------------------------------------------------------------------
     8     8     8     8     8     8     8     8     8     9     9     9
     1     2     3     4     5     6     7     8     9     0     1     2
                                    Date

     "*"  = data point,  "." = estimate

This graph is a logarithmic plot of the number of Internet hosts.

N.2 Number of Domains

   This chart shows the number of domains existing in the Internet
   Domain Name System as collected by ZONE.

        Date           Domains

        07/88              900
        10/88            1,280
        01/89            2,600
        07/89            3,900
        10/89            4,800
        10/90            9,300
        01/91           11,200
        07/91           16,000
        10/91           18,000
        01/92           17,000





Lottor                                                          [Page 6]

RFC 1296              Internet Growth (1981-1991)           January 1992


N.3 Distribution of IP Addresses per Host

   This chart shows how many hosts have how many IP addresses.  This
   data was collected on 1-Jan-92 and only the first 10 entries are
   shown.

     Addresses           Hosts

         1              715143
         2                9015
         3                1027
         4                 556
         5                 314
         6                 213
         7                 100
         8                  85
         9                  58
        10                  71

N.4 Distribution of Hosts by Top-level Domain

   This chart shows the number of hosts per top-level domain (top 40
   only) on 1-Jan-92.  The percentage listed is the increase since 1-
   Oct-91.  Large variations are probably due to problems and variations
   in the collection process; these figures are not meant to be
   authoritative, but serve as reasonable estimates.

   243020 edu 13%     13011 fr    4%     1791 dk   4%     357 be  -5%
   181361 com 12%     12770 nl   21%     1662 es  15%     334 gr  14%
    46463 gov 13%     12647 ch   10%     1506 kr   9%     308 br  26%
    31622 au  19%     11994 fi   15%     1111 nz -16%     284 mx  -5%
    31016 de  20%     10228 no    9%     1016 tw  n/a     207 is   0%
    27492 mil 26%      8579 jp    6%      929 za  n/a     146 pl  97%
    27052 ca  22%      4109 net -49%      784 pt  n/a     127 us  25%
    19117 org 10%      3324 at   19%      484 sg 251%      25 tn   0%
    18984 uk 139%      2719 it  197%      448 hk  78%      24 hu  71%
    18473 se  34%      2020 il   14%      374 ie  -7%       6 arpa 0%














Lottor                                                          [Page 7]

RFC 1296              Internet Growth (1981-1991)           January 1992


N.5 Distribution of Hosts by Host Name

   This chart shows the distribution of hosts by their host name on 1-
   Jan-92.  The host name is defined to be the first part of a fully
   qualified domain name.  Only the top 100 names are shown.

384 venus       204 mac4       172 mac9        155 pollux     138 chaos
356 pluto       201 hobbes     172 mac11       155 frodo      136 bart
323 mars        201 hermes     170 mac8        153 helios     135 pc5
288 jupiter     198 thor       169 phoenix     152 mac17      135 larry
286 saturn      198 sirius     169 mac12       151 vega       135 cs
285 pc1         196 gw         169 hal         151 mac18      133 odin
282 zeus        195 calvin     168 snoopy      150 falcon     131 tiger
262 iris        194 mac5       168 mac13       150 bach       131 sparky
260 mercury     191 mac10      167 mac15       146 castor     131 ariel
259 mac1        190 fred       167 mac14       145 sol        130 sneezy
258 orion       189 titan      167 grumpy      145 dopey      128 mac
254 mac2        189 pc3        163 gandalf     144 mac20      127 sun1
240 newton      186 opus       162 pc4         144 mac19      127 rocky
234 neptune     186 mac6       160 uranus      142 spock      126 pc6
233 pc2         185 charon     159 mac16       142 euler      125 hydra
224 gauss       185 apollo     158 sleepy      141 mickey     125 homer
222 eagle       179 mac7       158 io          141 atlas      124 isis
213 mac3        179 athena     157 earth       140 maxwell    123 moe
209 merlin      177 alpha      156 europa      140 happy      123 delta
207 cisco       172 mozart     155 rigel       140 doc        122 pc10

Future Issues

   ZONE currently runs on a DECsystem-20 and is written in assembler.
   The amount of data is quickly reaching the limits of the DEC-20
   section address space, and the hardware's ability to survive gets
   slimmer each day.  ZONE assembles all its data in core before dumping
   it to disk.  The implementation does this in order to be able to
   match host nicknames with official names before dumping complete host
   records.  Sometimes a nickname can be in a different domain than the
   official name, complicating simpler methods.

   A new version of ZONE needs to be written to run on a modern computer
   system.  A completely new architecture should be designed to handle
   the enormous amount of data collected and expected in the future.
   Data should be kept on disk so that a system crash will not wipe out
   days of collection.  Multiple zone transfers could be occurring in
   parallel to reduce the time needed for data gathering.  A new ZONE
   might run continuously, cycling through the domain system on a cycle
   lasting weeks to a month, updating a local database with statistics
   collected for each domain.  In this way, current statistics on the
   size of the Internet would always be known.  The resulting database



Lottor                                                          [Page 8]

RFC 1296              Internet Growth (1981-1991)           January 1992


   may also be useful for other network information services.

RFC References

   Libes, D., "Choosing a Name for Your Computer", RFC 1178, Integrated
   Systems Group/NIST, August 1990.  (Also FYI 5.)

   Mockapetris, P., "Domain Names - Implementation and Specification",
   RFC 1035, USC/Information Sciences Institute, November 1987.

   Mockapetris, P., "Domain names - Concepts and Facilities", RFC 1034,
   USC/Information Sciences Institute, November 1987.

   Lazear, W., "MILNET Name Domain Transition", RFC 1031, Mitre,
   November 1987.

   Harrenstien, K. Stahl, M., and J. Feinler, "DoD Internet Host Table
   Specification", SRI, October 1985.

   Postel, J., "Domain Name System Implementation Schedule - Revised",
   RFC 921, USC/Information Sciences Institute, October 1984.

Security Considerations

   Security issues are not discussed in this memo.

Author's Address

   Mark K. Lottor
   SRI International
   Network Information Systems Center
   333 Ravenswood Avenue, EJ282
   Menlo Park, CA  94025

   EMail: [e-mail]
















Lottor                                                          [Page 9]