I don't think that scene was about hacking. They have already rebooted the system to wipe what Nedry has done (which, on its own, is a notion that is unrealisti

I don't think that scene was about hacking. They have already rebooted the system to wipe what Nedry has done (which, on its own, is a notion that is unrealistic) then it was just waiting to be reactivated by navigating to the right subsystems.