Hi
From the tactics section in the rules:
Defense:
Normal (Man-to-man): normal, all others are based off this.
2-3 Zone: Increased inside defense and rebounding at the expense of a lot of perimeter defense. Somewhat slow pace.
3-2 Zone: Increased perimeter defense at the expense of interior defense. Slow pace.
1-3-1 Zone: Dramatically increased perimeter defense at the expense of interior defense and rebounding.
Full Court Press: Significant increase in created turnovers at the expense of stamina, defense, and rebounding. Very high pace.