I'm quite interested if orbiting satellites could handle the backhaul connection to Earth or if larger and more powerful ground stations or a Lagrange station w

I'm quite interested if orbiting satellites could handle the backhaul connection to Earth or if larger and more powerful ground stations or a Lagrange station would have a place. Clearly we communicate just fine with existing Mars and deep space probes, but the problem must change enormously when you want a 100 gigabit uninterruptible connection.