![]() Then a second connection to the server is made by the client, followed by a response of the FTP server from the port for sending data (the default data sending port is 20), when the real file transfer actually begins. ![]() Once the user enters the name of the server and the login credentials in the authorization fields of the FTP client, the FTP connection is established and the FTP control port of the FTP server (the default port for sending commands is 21) is opened. The FTP connections are executed through certain ports, which are either the default TCP ports or custom ports set by an administrator.Įxecuting an FTP port connection through a client is a two-stage process requiring the use of two different ports. ![]() Through FTP software tools users can establish connections with a remote machine of their choice and perform any necessary data transfers. ![]() The FTP, or the File Transfer Protocol, makes it possible for users to exchange files between their personal computers and remote servers with the help of specialized software tools called FTP clients.
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