Full-stack Web development Bootcamp

What is internet and World wide web(www)? | Module: 1

Definition: The Internet is the global system of interconnected computer networks that use
the Internet protocol suite (TCP/IP) to link devices worldwide.
 There are about 45 billion devices on the internet.


Internet Protocol Suite

The Internet protocol suite is used for relaying data(text, video, audio, image, etc) across network boundaries. Below are the most important protocols.

• SMTP: This is used to send and receive emails. All our email servers (like Gmail, Yahoo mail, etc) use this protocol.
• SSH: This protocol is used to securely log in to the remote application.
• HTTP: World Wide Web (WWW) is based on this protocol. This gives us the interconnected web pages which form the basis of the WWW.
• XMPP: WhatsApp (Instant messaging) and other messaging apps use this to
• Others.

So as we can see the internet is a much bigger entity than WWW, which is just one protocol to use it. The below diagram clearly shows the different components of the Internet Protocol.