fat AP - Computer Definition
In wireless local area networks (WLANs), an AP with sufficient program logic and processing power to allow it to enforce policies relating to access and usage, rather than working under the supervision of a centralized controller. (A fat AP may use information from a RADIUS server, for example.) A network based on fat APs is more costly and complex, but offers the advantage of faster access as they can act independently rather than having to consult a centralized controller for authentication and other security purposes. In a mobile application, users moving between AP zones of coverage realize faster handoffs with fat APs. See also authentication, RADIUS, server, thin AP, and WLAN.