When two or more computers are connected to each other in such a way that they can share data as well as software and even hardware together then they are said to be a part of a computer network. Computer networking is a combination of the fields of telecommunication and computers. There are various examples of networks like LAN or local area network that connects computers in a close by area like computers in a school. Then there is WAN or wide area network that connects computers at large distances even countries. You can consider the internet to be the largest WAN network. Then we have MAN or Metropolitan area networks that are bigger then LAN but smaller than WAN and connect cities. We also have wireless networks, they are the same as other networks except for the fact that the computers are not physically connected to each other, they communicate using frequencies. We are all used to sending and receiving data from our cell phones through infrared or Bluetooth, which is a form of a small wireless network.
