IEN 149                                                        J. Postel
RFC 765                                                              ISI
                                                               June 1980

                         FILE TRANSFER PROTOCOL


INTRODUCTION

   The objectives of FTP are 1) to promote sharing of files (computer
   programs and/or data), 2) to encourage indirect or implicit (via
   programs) use of remote computers, 3) to shield a user from
   variations in file storage systems among Hosts, and 4) to transfer
   data reliably and efficiently.  FTP, though usable directly by a user
   at a terminal, is designed mainly for use by programs.

   The attempt in this specification is to satisfy the diverse needs of
   users of maxi-Hosts, mini-Hosts, and TIPs, with a simple, and easily
   implemented protocol design.

   This paper assumes knowledge of the following protocols described in
   the ARPA Internet Protocol Handbook.

      The Transmission Control Protocol

      The TELNET Protocol

DISCUSSION

   In this section, the terminology and the FTP model are discussed.
   The terms defined in this section are only those that have special
   significance in FTP.  Some of the terminology is very specific to the
   FTP model; some readers may wish to turn to the section on the FTP
   model while reviewing the terminology.

(以下，略)