COMPUTER NETWORK AND SECURITY

The World Wide Web (WWW) and web servers are fundamental components of the internet that enable the sharing and accessing of information.

World Wide Web (WWW):

  • The World Wide Web is a system of interlinked hypertext documents and multimedia content that is accessed via the internet using web browsers.
  • It was invented by Sir Tim Berners-Lee in 1989 and became publicly available in 1991. The WWW is often referred to simply as "the web."

Web Server:

  • A web server is software or hardware that stores, processes, and serves web pages to users. It responds to requests from web browsers and delivers the requested web content.
  • Web servers use the Hypertext Transfer Protocol (HTTP) to communicate with web browsers. The secure version, HTTPS, uses SSL/TLS encryption for added security.
  • Common web servers include Apache HTTP Server, Nginx, Microsoft Internet Information Services (IIS), and others.

Working :

  • When a user enters a web address (URL) into a browser, the browser sends a request to the appropriate web server.
  • The web server processes the request, retrieves the requested web page or resource, and sends it back to the user's browser.
  • The browser then renders the web page, displaying text, images, multimedia, and other content.

 

World Wide Web in Computer Network

Components of a URL (Uniform Resource Locator):

  • A URL is a web address that specifies the location of a resource on the internet. It typically consists of the following components:
    • Protocol (e.g., http:// or https://)
    • Domain name (e.g., www.ezexplanation.com)
    • Path (optional, specifying the location of a specific resource on the server)
    • Query parameters (optional, providing additional information to the server)