Changes current remote directory. Must be connected. Connects to an FTP server. Disconnects from the FTP server. Must be connected already. Log in the server, giving authentication information. Must be connected already. Log out from the server. Must be connected already. Send noop command (convenience to avoid time-out driven disconnections by the server). Must be connected already. Download a file from the server. Must be connected already. True if the FTP client is currently connected to a server, false otherwise, or the contrary if the "not" option is enabled. True if the FTP client is currently logged in, false otherwise, or the contrary if the "not" option is enabled. Tests the reply code value regarding the last FTP command issued. Changes local current directory. Set data type for next file transfers. Must be connected already. Upload a file to the FTP server. Must be connected already. Deletes a file on the server. Must be connected already.