A sizeable geographical area with communication based on the telephone system is though as.
A sizeable geographical area with communication based on the telephone system is though as Wide area network.
A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local-area networks (LANs). Computers connected to a wide-area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites.
Wide Area Networks (WANs) A wide area network (WAN) is a data network, usually used for connecting computers, that spans a wide geographical area. WANs can be used to connect cities, states, or even countries. ... WANs also transmit data at slower speeds than LANs.