The FTP protocol (File Transfer Protocol) is a standard network protocol used to transfer files from one host to another over a TCP-based network, such as the internet. It uses separate control and data connections to transfer data between the client and the server. FTP supports two modes of file transfer: binary and ASCII. In binary mode, files are transferred as a stream of binary data, while in ASCII mode, the data is converted to ASCII code and sent over the network. FTP provides users with a simple and reliable way to upload and download files. However, it is considered to be an insecure protocol as it transmits data in plain text, making it vulnerable to interception by third parties.