Which of the following describes a WAN?

A wide area network (WAN) is characterized by its ability to connect devices and networks over a large geographical area, which can span cities, countries, or even continents. This type of network facilitates communication and data transfer between multiple local area networks (LANs) that may be situated far apart. WANs are crucial for enterprises that require connectivity across different locations, allowing for resource sharing and communication on a larger scale.

The characteristics of a WAN differentiate it from other types of networks. For instance, a network limited to a single building defines a local area network (LAN), which operates within a confined space and typically involves much higher data transfer speeds. Similarly, describing a local area network focuses on a more restricted area than a WAN covers. A wireless ad hoc network refers to a temporary network formed by devices in proximity to each other, which contrasts with the established and often permanent nature of WANs. Thus, the defining features of a WAN — its reach and capability to connect diverse locations — affirm its classification distinctly separate from these other networking types.