An Internet Encyclopedia 2.2. 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 server-FTP process to invoke access controls. The transfer byte size is always 8 bits. The transfer byte size is not necessarily the byte size in which data is to be stored in a system, nor the logical byte size for interpretation of the structure of the data. This connection follows the Telnet Protocol. A full duplex connection over which data is transferred, in a specified mode and type.