Definitions for "NSFNet"
A three_level network sponsored by the National Science Foundation to support research. The NSF is responsible for operation and management of a high_speed backbone network. Linked to the backbone are the mid_level networks, which can be discipline_specific or regional. Campus networks attach in turn to mid_level networks.
NSF computer network
The national backbone network, funded by the National Science Foundation and operated by the Merit Corporation, used to interconnect regional (mid-level) networks such as WestNet to one another.