[1][2] The networking equipments (switches, routers) and transmission media (optical fiber, copper plant, Cat5 cabling etc.)
are almost entirely owned by the campus tenant / owner: an enterprise, university, government etc.
College or university campus area networks often interconnect a variety of buildings, including administrative buildings, academic buildings, laboratories, university libraries, or student centers, residence halls, gymnasiums, and other outlying structures, like conference centers, technology centers, and training institutes.
Examples of such are the networks at Googleplex and Microsoft's campus.
If two buildings have the same domain and they are connected with a network, then it will be considered as CAN only.