Which internet protocol is primarily responsible for securing communication over a computer network, particularly for web browsing, by encrypting the data exchanged between a user's browser and a website's server?

The correct answer to the question "Which internet protocol is primarily responsible for securing communication over a computer network, particularly for web browsing, by encrypting the data exchanged between a user's browser and a website's server?" is Option D: HTTPS (Hypertext Transfer Protocol Secure).

The other options — A) FTP (File Transfer Protocol), B) SMTP (Simple Mail Transfer Protocol), C) HTTP (Hypertext Transfer Protocol) — are incorrect for this Computer Science question. As explained above: HTTPS is the secure version of HTTP, utilizing SSL/TLS encryption to protect data transmitted over the internet, ensuring privacy and data integrity during web browsing.