Yes there is a libero in men's volleyball.
The Libero in Volleyball is like a GoalKeeper in Soccer, The Libero is the most skilled defender in Volleyball. And in the rules of volleyball the Libero must wear a contrasting outfit to the team
1998 saw the international introduction of the defensive libero player to the sport of volleyball.
L is the Libero.
Yes, the libero can set. However the libero may not block, attempt to block, or serve.
A libero tracking sheet is used in volleyball to mark down when the libero comes in and out of the game and who he/she goes in or out for.
Yes, the libero can serve in volleyball. However, they can only serve for one position. Once the libero serves in a particular position in a game that is the only position where the libero is allowed to serve. However, the libero is not required to serve in that position for all subsequent rotations.