Based on distance computer network is divided into three categories
Local area network
Metropolitan Area Network
Wide area network
Range of local area network is within few kilometres like 5 to 10 kilometre if two computers are connected within a room then it is a local area network and it can span in college campus
Man the range of man is approx 1 City television service provider which which span within one City approx 50 to 70 kilometres
When wide area network it can span in one country power in multiple countries like telephone service provider