Learn volleyball skills and volleyball practice from Dr. Gylton Da Matta, a member of the International Volleyball Federation technical development committee. Watch how to integrate these drills into your volleyball lessons. It is the defense action in which the player must move forward and perform a defensive action. It often requires a floor defense follow-through (landing or floor defense). Defense is the action that a team takes from the time its opponent contacts or controls the ball until the ball crosses the net to its side and is either stuff blocked back to the opponent or controlled for an offensive play. Defense prevents the other team from scoring. Team defense is what a group of players does to keep the opponent from scoring.