A computer network may span any account of geographical area. It can be on a table, in a room, in a building, in a city, in a country , across continents or around the world. On the basis of the area covered, computer networks are classified as: PAN - Personal Area Network LAN - Local Area Network MAN - Metropolitan Area Network WAN - Wide Area Network PERSONAL AREA NETWORK PAN is a network of communicating devices (computer, mobile, tablet, printer, etc.) in the proximity of an individual. It can cover an area of a radius with few meters. When we transfer songs from one cell phone to another or from a PC to an MP3 player, a PAN is set between the two. PAN can be set up using guided media (USB) or unguided media (bluetooth, infrared) LOCAL AREA NETWORK LAN is a network of computing and communicating devices in a room, building, or campus. It can cover an area of radius with a few meters to few kilometers. A networked office building can contain a few small LANs (like some sc...