RFC 354 (rfc354) - Page 2 of 25

File Transfer Protocol

The File Transfer Protocol                                  July 8, 1972


11.A. Terminology

ASCII               The USASCII character set as defined in NIC
                    #7104. In FTP, ASCII characters are defined
                    to be the lower half of an eight bit code set
                    (i.e., the most significant bit es zero).

access controls     Access controls define users' access
                    privileges to the use of a system, and to the
                    files in that system. Access controls are
                    necessary to prevent unauthorized or
                    accidental use of files. It is the
                    prerogative of a user-FTP process to provide
                    access controls.

byte size           The byte size specified for the transfer of
                    data. The data connection is opened with
                    this byte size. Data connection byte size is
                    not necessarily the byte size in which data
                    is to be stored in a system, and may not be
                    related to the structure of data.

data connection     A simplex connection over which data is
                    transferred, in a specified byte size, mode
                    and type. The data transferred may be a part
                    of a file, an entire file or a number of
                    files. The data connection may be in either
                    direction (server-to-user or user-to server).

data socket         The socket on which a User-FTP process
                    "listens" for a data connection.

EOF                 The end-of-file conidition that defines the
                    end of a file being transferred.

EOR                 The end-of-record condition that defines the
                    end of a record being transferred.

error recovery      A procedure that allows a user to recover
                    form certain errors such as failure of either
                    Host system or transfer process In FTP,
                    error recovery may involve restarting a file
                    transfer at a given checkpoint

FTP commands        A set of commands that comprise the control
                    information flowing from the user-FTP to the
                    server-FTP process.