Answer:
HTTP (HyperText Transfer Protocol)
Explanation:
HyperText Transfer Protocol (HTTP) is a protocol used in the world wide web for dictating and defining how data and information are formatted and transmitted across a network. It also describes and specifies the set of actions that web servers and browsers perform on these data. With the HTTP, client browsers (such as those of Macintosh) can retrieve web pages from web servers (such as Microsoft web server).
To retrieve these web pages, the client browser first makes a request via http to the server. Then, if the server understands the request and the requested web page is available and accessible, the server, as a way of responding, returns the web page to the requesting web browser.
The regular HTTP uses a port number of 80 while its more secure version (HTTPS) uses a port number of 443.