Why and when to use claims-based authentication?

Question

I understand MS recommends claims-based authentication for new installations of SP 2010. This authentication model is based on WIF. It is a new authentication model available in SP 2010.

But, I would like to know:

• Why it is recommended to use claims-based authentication in new installations?
• When should I pick claims-based authentication over classic authentication? and visa verse.

Answer 1

MSDN: Why Use Claims-Based Identity