Which type of network allows computers to communicate within the same building?

The option indicating a Local Area Network (LAN) is correct because a LAN is specifically designed to facilitate communication between computers and devices in a limited geographical area, such as a single building or a small group of buildings. LANs are characterized by high data transfer rates and relatively low latency, which makes them ideal for connecting computers within close proximity, thereby enabling efficient file sharing and resource access among users.

In contrast, a Wide Area Network (WAN) connects devices over larger distances, which can span cities or even countries, typically utilizing leased telecommunication lines. A Storage Area Network (SAN) is specialized for connecting storage devices to servers within data centers, focusing on handling storage rather than general-purpose network communications. Finally, a Campus Area Network (CAN) connects multiple LANs within a specific campus or site but is broader than a single building's network. Thus, a LAN is the most suitable option for facilitating communication within the confines of the same building.