A Wide Area Network (WAN) is a telecommunications network that extends over a large geographical area, connecting multiple local area networks (LANs) and other types of networks. WANs are commonly used by businesses and organizations to facilitate communication and data sharing across different locations, such as offices in various cities or countries. WANs utilize various technologies, including satellite, fiber optics, and leased lines, to transmit data over long distances. They enable users to access resources, share information, and collaborate effectively, regardless of their physical location. Examples of WANs include the internet and private corporate networks.