Why use a radius server (Remote authentication dial-in user service)?
The use of a radius server enhances security on a wireless network by the use of a shared secret. This offers increased security over WEP as the secret is never broadcast over the air so if anybody is snooping your network, no security parameters can be retrieved. In this instance, the client supplies the authentication details and does rely on the access point. The USR5453 has a Radius Server built in, but it can also allow the client to connect to the Microsoft Windows ISA Radius server. This will enable the access point to form a secure tunnel for data transmission.
