It is called a foot fault. You can also have a foot fault if you step over the center line onto the opponent's court.
In volleyball, you serve from behind the back boundary line on your side of the court.
It is where you would serve from.
You can serve from anywhere on the back line of the court.
behind the end line
In volleyball, it is not permissible to cross the center line during play.
yeah it is
They have to be behind the serving line, but they can jump past this line when serving.
one violation in volleyball is hitting the net while volleying with the other team
sideline
A foot fault is when in volleyball you serve and you pass the line or put your foot under the net.
Baseline
a serve is when a player on a team is behind the white line and hits it over the net; make sure you don't foot fault :)