Campus Area Network (CAN)

A network that connects two or more LANs but that is limited to a
specific and contiguous geographical area such as a college campus,
industrial complex, or a military base. A CAN may be considered a type
of MAN (metropolitan area network), but is generally limited to an
area that is smaller than a typical MAN. This term is most often used
to discuss the implementation of networks for a contiguous area. This
should not be confused with a Controller Area Network. A LAN connects
network devices over a relatively short distance. A networked office
building, school, or home usually contains a single LAN, though
sometimes one building will contain a few small LANs (perhaps one per
room), and occasionally a LAN will span a group of nearby buildings.
In TCP/IP networking, a LAN is often but not always implemented as a
single IP subnet