Which of the following best describes the coverage of a Wide Area Network (WAN)?

A Wide Area Network (WAN) is designed to cover a broad geographic area, making it capable of extending across cities, countries, or even continents. This includes interconnecting multiple Local Area Networks (LANs) and providing a communication platform for organizations that span large distances. WANs utilize various technologies such as leased lines, satellite links, and the internet to facilitate data transfer and communication between locations that are geographically dispersed.

In contrast, the other options describe networks that are more localized. A WAN is not confined to a single building or a home, as indicated in the first two options. Additionally, the fourth option suggests a limitation to urban areas, which does not accurately reflect the WAN's capability to operate in rural or remote locations as long as there is the necessary infrastructure. Thus, the choice accurately reflects the expansive nature and operational scope of Wide Area Networks.