Access Point. In wireless local area networks (WLANs), a centralized hub through which computers and peripherals interconnect and intercommunicate in infrastructure mode. Terminal devices generally connect to the APs using unlicensed RF bands, although infrared (IR) sometimes is used. APs can interconnect directly over RF links, but generally are hardwired to switches. In terms of functionality, APs can be fat or thin. A fat AP is sufficiently intelligent to act independently, while a thin AP must act under the supervision of a controller. See also ad hoc mode, fat AP, hardwired, IR, RF, thin AP, unlicensed, and WLAN.