Which of the following protocols uses the port 443?

(A) HTTPS
(B) HTTP
(C) SMTP
(D) SSH

HTTPS is the correct answer.

Hypertext transfer protocol secure (HTTPS) – Port 443. HTTPS is the secure version of HTTP which is the primary protocol used to send data between a web browser and a website. HTTPS is encrypted in order to increase the security of data transfer. This is particularly important when users transmit sensitive data, such as by logging into a bank account, email service, or health insurance provider.