A web server is configured to only allow secure connections. Which of the following will a user most likely use to connect to the web server?

TFTP (Trivial File Transfer Protocol) is an insecure protocol primarily used for simple file transfers, not for secure web server connections.

HTTP (Hypertext Transfer Protocol) is the fundamental protocol for web communication, but by itself, it is unsecured; secure web connections use HTTPS, which is HTTP over TLS.

FTP (File Transfer Protocol) is used for transferring files but is inherently insecure for sensitive data unless secured with TLS (FTPS), and it's not the primary protocol for general web server access.

TLS (Transport Layer Security) is the cryptographic protocol that ensures secure communication over a computer network. When a web server is configured to only allow secure connections, it means it expects communication over protocols secured by TLS, such as HTTPS. A user's web browser will use TLS to encrypt the HTTP traffic, establishing a secure, authenticated, and private connection to the web server.