Which data transfert mode?

Hello,

which data transfert mode is best/appropriate for a image deploy task, for 15 to 30 computers at the same time.

- the default one, mouted shared image folder (the actualy I have tested with only one computer)

- Ghostcast session

- P2P Multicast

I actualy can only make my migration tests with only one computer, so sorry if my question seem obvious, I just want to be prepared for the day.

Thanks