AARNet (Australia’s Academic and Research Network) has produced a terrific animation video (http://www.youtube.com/watch?v=qk9aljqu20A) for end users to get to know about the eduroam services available to them.
eduroam (EDUcation ROAMing) allows students and staff visiting other participating institutions to get network access simply by using the same username and password from their home institution. Eduroam is a growing global federation linking hundreds of institutions across 25 countries in Europe, North America, Asia and Australia.
Radiator RADIUS server (with RadSec) is used extensively in the world-wide network to ensure reliable transportation and security of authentication data throughout the eduroam RADIUS federation.