What is the primary purpose of a Wide Area Network (WAN)?

The primary purpose of a Wide Area Network (WAN) is to connect computers or Local Area Networks (LANs) across large geographical areas. WANs are designed to facilitate communication and data transfer over significant distances, enabling organizations or individuals to connect their disparate networks, often spanning cities, countries, or even continents. This capability is essential for businesses with multiple locations, allowing seamless access to shared resources, applications, and services across various sites.

In contrast, the other answer choices represent different network functionalities or configurations. Connecting devices within a single room pertains more to Local Area Networks (LANs), which are limited in scope and engagement. Creating a wireless internet connection refers to specific wireless technologies rather than the broader function of networking across extensive areas. Finally, securing local file storage does not relate to WANs; rather, it concerns data management practices within a localized context that may involve LANs or individual devices. Hence, the choice that accurately encapsulates the essence of a WAN's function is its role in interconnecting widely dispersed networks.