What type of network is usually confined to a single building and managed by a single entity?

A Local Area Network (LAN) is specifically designed to operate within a limited geographic area, such as a single building or a group of buildings that are in close proximity. This type of network allows for high-speed data transfer and resource sharing, such as printers and file servers, within that localized space.

The key characteristic of a LAN is that it is typically managed by a single entity, which means that the organization responsible for the network has dedicated control over its configuration, maintenance, and security. This centralized management allows for efficient troubleshooting and effective policy implementation tailored to the needs of the organization.

In contrast, a Metropolitan Area Network (MAN) covers a larger geographical area, typically a city or a large campus, and is maintained by multiple entities. A Wide Area Network (WAN) spans broader areas, potentially across countries or continents, and involves multiple management authorities. A Campus Area Network (CAN) is somewhat similar to a LAN but is broader, encompassing multiple buildings on a college or corporate campus, and may involve more than one entity managing the network.

Therefore, understanding the specific confined nature and single-entity management of a Local Area Network clarifies why it is the correct answer in this context.