(NsFNET) A high speed hierarchical "network of networks" in the Us, funded by the National science Foundation. At the highest level, it is a backbone network comprising 16 nodes connected to a 45Mb/s facility which spans the continental United states. Attached to that are mid-level networks and attached to the mid-levels are campus and local networks. NsFNET also has connections out of the Us to Canada, Mexico, Europe, and the Pacific Rim. The NsFNET is part of the Internet. (1993-01-01)