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

The primary function of a Wide Area Network (WAN) is to link offices across different locations. A WAN enables the interconnection of multiple Local Area Networks (LANs), allowing for communication and resource sharing over large geographic areas, which can span cities, countries, or even continents. This capability is essential for organizations that operate in multiple locations, as it facilitates remote access to data, applications, and services crucial for business operations.

In contrast, the other options focus on more localized connectivity or enhanced services that do not define WANs. Connecting computers within a single building pertains to Local Area Networks (LANs), not WANs. Additionally, providing local wireless connectivity refers to technologies like Wi-Fi that serve small, defined areas. Enhancing mobile data services is more about optimizing connectivity for mobile devices rather than the overarching function of a WAN. Understanding that WANs serve to connect disparate sites is key to recognizing their role in modern networking.