How to connect QGC and pixhawk with wire?(tethered drone)Is it possible?

Hello,

iam working on tethered drone where i would like to use pixhawk. Is it possible to connect pixhawk with computer wiht wire (UTP) and control drone with qgc?

another question(stuppid one):
is it possible to fully operate pixhawk (operate drone with qgc) while is conected with usb cable to computer? This would be the easiest solution for my project.

I need solution to control a drone without rc. Any other solution?

Thanks