Which networking type uses radio signals for communication over wide areas?

The correct answer identifies a network type that is designed for covering large geographical areas using radio signals. A Wireless Wide Area Network (WWAN) is characterized by its capacity to communicate wirelessly over significant distances, often spanning cities or even regions. This technology typically utilizes cellular network protocols, allowing devices to connect to the internet or other networks without physical lines.

WWANs are particularly beneficial for mobile users and devices that require connectivity over vast areas, making them ideal for scenarios where traditional wired connections would be impractical or unavailable. This type of network leverages cellular infrastructure, such as towers, to provide broad coverage and is commonly utilized in mobile phones, tablets, and other portable devices.

In contrast, other networking types mentioned are more limited in their coverage areas. For instance, Wireless Local Area Networks (WLANs) are designed for smaller areas like homes or offices. Wireless Metropolitan Area Networks (WMANs) provide service across a city or a large campus but do not extend as far as WWANs. Wireless Personal Area Networks (WPANs) are meant for very short-range connections, typically within a small area around a person, such as connecting Bluetooth devices.

Thus, WWAN is specifically suited for wide coverage using radio signals, which distinctly