What protocol is commonly used for transferring files over the internet?

The protocol that is commonly used for transferring files over the internet is File Transfer Protocol (FTP). FTP is specifically designed for the purpose of transferring files between a client and a server, allowing users to upload or download files seamlessly. It operates over a TCP/IP network and provides a robust framework for file management, including commands for file upload, download, and directory navigation.

While other protocols listed have their own specific functions, they do not serve the primary purpose of file transfer in the same way that FTP does. Hypertext Transfer Protocol (HTTP) is primarily used for transferring web pages and web-related content, while Simple Mail Transfer Protocol (SMTP) is focused on sending emails. Post Office Protocol (POP) is used for retrieving emails from a server, not for transferring files. Hence, File Transfer Protocol stands out as the appropriate choice for file transfers over the internet.