National Science Foundation Network (NSFNet) was a major part of early 1990s Internet backbone.
Often confused with NFSNet[?] which has nothing to do with NSFNet. Also has nothing to do with Network File System (NFS), a TCP/IP file sharing protocol[?] like SMB[?].
Organisations connecting to the Internet in the early 1990s had to sign a usage agreement directly with NSFnet to gain access to large parts of the Public Internet, regardless of what Internet Service Provider they purchased Internet access[?] from.
On April 30, 1995, the NSFNET Backbone Service was successfully transitioned to a new architecture, where traffic is exchanged at interconnection points called NAPs[?] (Network Access Points[?].)
