Wide Area Networks Across Distances

When a network must connect places that are far apart, a LAN is not enough. A WAN (Wide Area Network) links networks across large distances, such as different cities, countries, or continents. WANs are how a company joins its branch offices and how local networks reach the global internet. The defining trait of a WAN is its broad geographic reach.

A WAN connects multiple LANs and sites that are geographically separated into one larger network. Rather than wiring across a city yourself, a WAN typically uses links provided by telecommunications companies. The internet itself is the largest WAN of all. A WANs purpose is to extend connectivity far beyond the single building a LAN can cover.