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                          TCP/IP-20 Doc File

                             Version 4.0


                              31 May 88


                       TOPS-20 Version 7(21017)





     COPYRIGHT (C)  DIGITAL EQUIPMENT  CORPORATION 1976,  1987, 1988.   ALL
     RIGHTS RESERVED.


     THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
     ONLY IN  ACCORDANCE  WITH THE  TERMS  OF  SUCH LICENSE  AND  WITH  THE
     INCLUSION OF THE ABOVE COPYRIGHT  NOTICE.  THIS SOFTWARE OR ANY  OTHER
     COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO  ANY
     OTHER PERSON.  NO  TITLE TO AND  OWNERSHIP OF THE  SOFTWARE IS  HEREBY
     TRANSFERRED.

     THE INFORMATION IN THIS SOFTWARE  IS SUBJECT TO CHANGE WITHOUT  NOTICE
     AND SHOULD  NOT BE  CONSTRUED  AS A  COMMITMENT BY  DIGITAL  EQUIPMENT
     CORPORATION.

     DIGITAL ASSUMES NO RESPONSIBILITY  FOR THE USE  OR RELIABILITY OF  ITS
     SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.

TCP/IP-20 V4.0 Doc File, TOPS-20 7(21017)                       Page 2


                          TABLE OF CONTENTS


        1.0     PRODUCT SUMMARY  . . . . . . . . . . . . . . . . . . 3
        2.0     PACKAGING STRATEGY . . . . . . . . . . . . . . . . . 3
        3.0     TOPS-20 MONITOR CONFIGURATIONS WITH TCP/IP . . . . . 3
        4.0     AUTOPATCH AND KEY FILES  . . . . . . . . . . . . . . 4
        5.0     PROBLEM REPORTING  . . . . . . . . . . . . . . . . . 4

TCP/IP-20 V4.0 Doc File, TOPS-20 7(21017)                       Page 3
PRODUCT SUMMARY                                              31 May 88


     1.0  PRODUCT SUMMARY

          TCP/IP-20 includes those TOPS-20 modules which are  required
     for the TCP/IP protocols to be used in conjunction with the AN20,
     the NIA20 (using Ethernet),  or  the  CI20  (to  another  TOPS-20
     system).

          As a courtesy to customers, the package also  provides  many
     of  the public domain utilities which are commonly used in TCP/IP
     environments such as FTP and TELNET.  There may be  more  current
     versions of these utilities available from other sources.



     2.0  PACKAGING STRATEGY

          TCP/IP-20  is  provided  under  the  QT090   license.    The
     TCP/IP-20 Distribution tape contains those files which are unique
     to TCP/IP-20.  It does not contain all of the  TOPS-20  utilities
     and  documentation  files.  It should be merged with the contents
     of QT023 Distribution tape in order to make  a  complete  TOPS-20
     with TCP/IP-20 package.

          The TCP/IP-20 package contains the complete TOPS-20  monitor
     .REL library (with TCP/IP-20 modules) and pre-built monitors.

          There  is  no  longer  a  TCP/IP-20  Monitor  Sources  tape.
     Instead,  .KEY  files  are included on the TCP/IP-20 Distribution
     tape.  These .KEY files can be  used  to  decrypt  the  TCP/IP-20
     specific  monitor  .MAC  files found on the Monitor Sources tape.
     This tape is provided to customers who are licensed  for  TOPS-20
     sources.  The .KEY files are discussed further in section 4.0.



     3.0  TOPS-20 MONITOR CONFIGURATIONS WITH TCP/IP


     1.  TCP/IP Maximum Configuration

         TOPS-20 V7.0 monitors built to support both TCP/IP  (ARPAnet)
         and  DECnet  networks  will not support the maximum number of
         jobs, TTYs, and memory.  At a  minimum,  such  monitors  will
         support  those  configurations  possible  under TOPS-20 V6.1.
         (Approximately 80 jobs, 2MW of memory,  10  pages  less  than
         normal JSB free space).

     2.  Larger configurations can be supported by building the TCP/IP
         monitor without DECnet.

TCP/IP-20 V4.0 Doc File, TOPS-20 7(21017)                       Page 4
AUTOPATCH AND KEY FILES                                      31 May 88


     4.0  AUTOPATCH AND KEY FILES

          TCP/IP-20 will receive maintenance via the normal  Autopatch
     updating  mechanism.   In order to maintain limited access to the
     TCP/IP-20 .REL files, the TOPS-20 REL library with TCP/IP  in  it
     comes  with an encryption key (the .KEY file).  This library will
     be distributed on the normal Autopatch tape, encrypted with  this
     key  file.   The  PEP utility which processes the Autopatch tape,
     will use this key to decrypt the file  (thus  you  must  have  it
     available when you install Autopatch tapes).

          The TCP/IP Distribution tape has a .KEY file for EACH source
     file.   The  TOPS-20  Source  Update  tape  which is delivered in
     conjunction with each Autopatch update will contain  all  changed
     monitor  sources.   The  TCP/IP  source modules will be encrypted
     with their respective keys.  You will have to run the  decryption
     program  to  make  these  sources usable.  This program, entitled
     DCRYPT.EXE,  is  found  in  the  third  saveset  of  the   TCP/IP
     Distribution tape.



     5.0  PROBLEM REPORTING

          Problems with the TCP/IP facilities in the monitor should be
     reported  using  normal  SPR  mechanisms.   There  is  no Digital
     support for the utilities.