The same way terrestrial data links work - you work out your usage patterns and make compromises. You can't guarantee 100% bandwidth available 100% of the time.

The same way terrestrial data links work - you work out your usage patterns and make compromises. You can't guarantee 100% bandwidth available 100% of the time. This is some of the rationale behind data caps. While you can still exceed the available bandwidth if all your customers get on and use their connection to the max, a data cap forces your customers to meter their usage out over the month and reduce the impact of this concurrent usage pattern.