There are tow kinds of brakdes--disc brakes and drum brake, many older cars use the disc brakes in front wheels and drum beakes in the back wheels.
Now many cars use all disc brake because of strong braking effect at the high speed.
And many high-class cars used disc brakes.
The advantages of disc brakes
1, disc brakes have the better heat resistance than drum brakes , wont't cause the braking failure when in a continuous braking state

2, Fast and high-frequency braking action is more in line with ABS systems.
3, wheel brake force is evenly.
4, Better drainage ,can reduce the adverse situation caused by water or sediment.
5, Simple structure and easy maintenance.