Zone defense ... (cup)

Basically players are placed at short, middle and deep.

CUP
the main purpose of the cup is to make the opponent make a mistake pass... You will have 3 people in the 'cup.' Basically, the job of these groups of people are to follow the disc to every thrower at short. Of course, these people has to be good in running, and can run hard to chase the disc.
One person in the cup will start marking. You can't have another person within 3 meters of the thrower so that u won't be called double team. The 2 people are actually trying to shut down the angles.. the triangle cup must be kept in a good shape ALWAYS.. cannot be too wide, or too narrow. If is, then the opponent might get chance to pop into the cup and get the disc.

Wing
2 people, 1 at left and 1 at right. Their responsibility is to prevent the disk from moving up the sideline on a swing, and to try to prevent the 'poppers' from getting the disk in the middle.

Short deep
responsible for making sure that the two wings know where the offensive players are, and is also responsible for helping the 'deep deep' if they get 2 people back.

Deep deep
The person responsible for the long throw. They should never let anyone behind them. This person is generally the tallest and faster person on the defense. If they end up with several offensive players back, they call for help from the 'short deep'.