Which protocol is used for transferring files over the internet?

The correct answer is FTP (File Transfer Protocol), which is specifically designed for transferring files over the Internet. It operates on a client-server model where the client can upload or download files from a remote server. FTP provides a reliable way to transfer binary or text files and is widely used for sharing files between systems over a network.

The other options serve different purposes: SMTP (Simple Mail Transfer Protocol) is primarily used for sending emails, making it unsuitable for file transfer. HTTP (Hypertext Transfer Protocol) is used for transferring hypertext documents and is primarily associated with web traffic, but it isn't specialized for file transfers like FTP is. Telnet is a protocol that allows for remote access to servers and network devices but does not handle file transfers. Hence, FTP is the most appropriate choice for file transfer tasks over the Internet.