What Does Non-Broadcast Multiple Access (NBMA) Mean?
Non-broadcast Multiple Access (NBMA) refers to a computer network to which several hosts are connected. However, the data are transmitted only directly from one computer to another single host across a switched fabric or over a virtual circuit. NBMA networks support broadcast or multicast traffic manually.
Techopedia Explains Non-Broadcast Multiple Access (NBMA)
NBMA networks work opposite of broadcast networks.