You are allowed three substitutions per game.
In Soccer each side is allowed two substitutes.
No, you are not allowed to serve with a fist in any level of volleyball.
There are 12 substitutes allowed in indoor volleyball.
Yes, blocks are allowed but not on a serve.
You aren't allowed to block a serve in volleyball.
there are no strikes in volleyball.
Yes, they are
One of the things volleyball players aren't allowed to do is step on or past the serving line.
No, a block is separate from the three allowed hits in volleyball. Also, someone who blocks is allowed to hit the ball again right after they block it.