Protocol:
HTTP is a protocol used to transfer data across the Web via a client-server (web browser-web server) model. HTTPS encrypts all data that passes between the browser and server using an encryption protocol called Transport Layer Security (TLS), preceded by Secure Sockets Layer (SSL).
Subdomain:
The subdomain or World Wide Web(WWW) is accessible to anyone with an internet connection, providing a vast amount of information at our fingertips. It enables users from all over the world to access and share data, breaking down barriers of distance and time.
Domain Name:
A domain name is a unique, easy-to-remember address used to access websites, such as ‘google.com’, and ‘facebook.com’. Users can connect to websites using domain names.