we are not sure if we should use EAP-FAST as authentication method or if we should use PEAP or EAP/TTLS. Could you please inform us which one is safer ? For PEAP or EAP/TTLS we would need a Radius Server such as ACS while we could assign an Access Point as local authentication server if we used EAP-Fast. Is the extra cost for an ACS server justified only to be able to use PEAP ? Thanks for your help.