What protocol would you utilize to upload files to a web server?

To upload files to a web server, the most commonly used protocol is FTP (File Transfer Protocol), which allows for efficient file transfer between a client and a server. Alternatively, SFTP (SSH File Transfer Protocol) is a secure version of FTP that encrypts the data during transfer. For web applications, HTTP/HTTPS can also be used for file uploads through forms, typically leveraging the POST method. Each protocol has its own advantages depending on the specific requirements of security and ease of use.