An administrator is asked to securely upload a configuration file to a web server in a cloud. Which of the following protocols should be used in this scenario?

SFTP (SSH File Transfer Protocol) is a secure file transfer protocol that uses SSH for encryption and authentication; while excellent for secure file transfer, if the upload is to a web server's web interface, TLS is the underlying security protocol for HTTPS.

SSL (Secure Sockets Layer) is an older, deprecated cryptographic protocol that has known vulnerabilities and has been largely superseded by TLS for secure communication.

TLS (Transport Layer Security) is the cryptographic protocol designed to provide secure communication over a computer network by encrypting the data exchanged between a client and a server. When uploading a file to a web server, especially via a web interface (HTTPS), TLS ensures the confidentiality and integrity of the configuration file during transit by establishing a secure channel.

HTTP (Hypertext Transfer Protocol) is an unencrypted protocol for transmitting data over the web and is not suitable for securely uploading sensitive information like configuration files.