World Wide Web
The World Wide Web (www) consists of four building blocks:
- A text format to represent documents: HTML
- A protocol to exchange HTML documents: HTTP
- A client program to view these documents: Web Browser
- A server to give access to the documents: Web Server
The web uses URLs of the form http://website.org/index.html to request the
resource index.html from a webserver with an IP address that is acquired by
resolving the domain name website.org using DNS.