Networks and WWW

A network is a lot of computer systems and computing hardware devices that are connected together through communication channels. It makes communication and sharing of information much easier.
Types of networks
LAN: (Local Area Network) It is a network for a room only, and it connects the devices in it.
MAN: (Metropolitan Area Network) I connects various LANs in a city or a big campus.
WAN: (Wide Area Network) It connects MANs and LANs around a wide area, like a city or group of citites.

What is World Wide Web?
It is a big network, formatted in HTML, that connects people all around the world.