FTP

FTP or File Transfer Protocol is a method of copying files between two computers on a network. One computer acts as an FTP Server and the other as an FTP Client.

Security

FTP transmits all data, including passwords, in cleartext, making them easily intercepted by eavesdroppers on a network.

Alternatives

SFTP is a much more secure alternative to FTP, which has most of the same functionality as FTP, but transmits data using SSH.