You might be thinking of the 6 service zones.
(your side)
1 - back right
2 - front right
3 - front middle
4 - front left
5 - back left
6 - back middle
In upper level volleyball there can be around 30-40 serving zones
the main types of serves are:
Float serve
Jump serve
Jump float
Long serve (distance standing from service line not distance served)
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