SANS Institute - ftp

=Description=
The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server. FTP is built on a client-server model architecture and uses separate control and data connections between the client and the server.

FTP is commonly used to transfer website files from a server to a local computer or to upload files from a local computer to a server. It can also be used to transfer files between two remote servers.=More Information=
https://en.wikipedia.org/wiki/File_Transfer_Protocol