Network Types (broadcast multi access, nbma, etc)

lilott8

I am having trouble distinguishing a:

Nonbroadcast Multi Access
Nonbroadcast multipoint
broadcast multipoint
brodcast point to multipoint

I can deduce what they mean from the actual definitions of the words, ie Non Broadcast Multi-access means that broadcasts are not sent across a link that multiple things use.

But that is as far as my definitions go. I am unsure how to apply those to frame-relay, switching, etc.

Any help or resources would be greatly appreciated.