Which type of network is usually contained inside one office building?

Computer networks are classified by the size of the area they cover. A network confined to a single building, such as one office, one school building, or one home, is called a Local Area Network (LAN). It connects computers and devices that are close together, usually using cables or a local wireless router.

A Campus Area Network (CAN) covers several buildings on one site, larger than a single office. A Metropolitan Area Network (MAN) spans a city, and a Wide Area Network (WAN) spans a country or the entire globe, connecting many separate LANs together, for example the internet. Since the question specifies a network contained inside one office building, the scale matches a LAN, not the larger categories.

Exam takeaway: rank the network types by geographic scale from smallest to largest, LAN, CAN, MAN, WAN, and match the scenario described to the size that fits.