Players and coaches do not refer the locations on the court by LF or RB, they call them “zones.” The court is separated into 6 zones, with zone 1 starting in the service position in RB. The order then continues counter-clock-wise around the court.
If a ball lands outside of the court boundary lines after being sent by the opposing team, it is “out” and a point is awarded.
If a player sends the ball over the net to the other side but the ball does not travel between the boundaries of the antennae, it is “out” and a point for the other team (whether the ball was passed, set, hit, served, etc.).