Which protocol typically uses port 443?

Port 443 is primarily associated with HTTPS, which stands for Hypertext Transfer Protocol Secure. This protocol is used for secure communication over a computer network, especially on the internet. It encrypts the data exchanged between a web browser and a server using SSL/TLS (Secure Sockets Layer/Transport Layer Security) for privacy and security. As a result, HTTPS is essential for protecting sensitive information, such as online transactions, personal data, and login credentials, from being intercepted by malicious actors during transmission.

Other protocols mentioned, such as HTTP, SNMP, and FTP, utilize different ports: HTTP uses port 80, SNMP typically runs on port 161, and FTP operates over ports 20 and 21. Understanding these port assignments helps in network configuration, troubleshooting, and maintaining security policies.