How do I identify which type of disc breaks I have on my mountain bike?

Question

How do I identify which type of disc breaks I have on my mountain bike?

Answer 1

cable pull ones have a wire, hydraulics have tubes going into the caliper.

Answer 2

you will see a cable running to them and it will have normal v-brake levers if its a cable run brake

If its hydrolic you will not see these and there will be no obvious way of telling what powers it from just looking

Answer 3

The "cables" running from your handlebars to the brakes will be smooth if they are cables.

If they are hydraulic, they will have ridges.