What protocol is used for transferring files to and from a web server?

The correct answer, FTP, stands for File Transfer Protocol. It is specifically designed for transferring files between a client and a server over a network, such as the internet. FTP allows users to upload files to, download files from, or delete files from a server, providing a simple method for file management on remote hosts.

In contrast, HTTP (Hypertext Transfer Protocol) is primarily used for transferring hypertext documents, such as web pages, and is not optimized for file transfer in the same way that FTP is. SMTP (Simple Mail Transfer Protocol) is used for sending emails, not for file transfer tasks, while SNMP (Simple Network Management Protocol) is used for network management and monitoring devices on a network instead of transferring files. By focusing on the unique capabilities of FTP, we can see why it's the correct choice for file transfers on a web server.