The RADIUS server (and its data store or authentication backend) is what controls access to the network and additionally supplies the keys used by the AP and wireless client to encrypt a given ...

As dial-in network access became ... information to an AP and anointed RADIUS as the protocol of choice for the AP to use with a back-end security server. This solved the scalability problem.

The difficulty of setting up a RADIUS server varies ... settings or each AP. For traditional RADIUS servers, these are usually entered in the Network Access Server (NAS) list.