Description: realized the ftp server functions (1) run-FTPd FTP server daemon, FTP user request. (2) users running FTP, FTP server requests for services. (3)- FTPd Daemon FTP users received a request, derived from the process-the process of FTP and FTP user interaction, file transfer control to establish connection (4) User input FTP subcommands, the server receiving subcommand, if correct order, both parties have a data transmission process FTP-DATA, set up a data link for data transmission. (5) The second son of orders data transmission End, the demolition of data connectivity, the end of the FTP-DATA process. (6) users to import FTP subcommands, repeat (4), (5) the process until the user input quit order to remove control of linking the two sides, the end of file transfer, FTP end of the process.
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