What is Audi A5's quattro system and how does it work?

I'm interested in learning more about the technology behind the quattro system in the Audi A5. Specifically, how does it distribute power between the front and rear axles for superior handling and performance?

The quattro system in Audi A5 uses a center differential to send power to both the front and rear axles in a ratio of 40:60, providing a balanced distribution for optimal traction and handling. It also has the ability to send power to individual wheels as needed for enhanced stability and control.