What is the main purpose of HTTP?

The primary purpose of HTTP (Hypertext Transfer Protocol) is to define rules for requesting and serving web pages. It establishes how messages are formatted and transmitted over the web, enabling the client (usually a web browser) and server to communicate effectively. When you enter a URL into your browser, it uses HTTP to request the web page from the server. In response, the server sends the requested content back to the browser, which then renders the web page for the user. This protocol orchestrates the interaction between clients and servers and specifies how resources are retrieved or submitted.

The other options focus on distinct concepts that do not align with the fundamental function of HTTP. For example, securing data or encrypting passwords pertains to security protocols like HTTPS or encryption standards, which enhance HTTP by adding security layers but are not the core purpose of HTTP itself. Similarly, managing server resources deals with server administration and performance, rather than the specific rules for data exchange that HTTP dictates.