What type of network covers a large geographical area, such as a city or country?

The correct answer is Wide Area Network (WAN). A WAN is specifically designed to cover large geographical areas that can span cities, countries, and even continents. It is characterized by the ability to connect multiple Local Area Networks (LANs) and other networks over vast distances, utilizing various technologies such as leased lines, satellites, and Internet connections. This type of network is essential for organizations with offices in different locations, enabling seamless communication and data transfer across great distances.

The other types of networks play more localized roles. A Personal Area Network (PAN) is limited to a very small area, typically within a range of a few meters, often used for connecting devices like smartphones and laptops. A Local Area Network (LAN) operates within a limited area, such as a single building or campus, allowing devices to communicate over a short distance. A Metropolitan Area Network (MAN) covers a larger area than a LAN but is still confined to a specific city or region, bridging the gap between LANs and WANs. Therefore, while both MANs and WANs serve larger spaces, only a WAN is suited for vast geographical coverage extending beyond city limits.