iPrint Appliance Which mode I need select when HP UPD Driver ?

Hi
I am learning , and I try to install a windows 7 as renderer..but I have a question then install HP UPD driver.
it ask me which mode I will use==>Traditional mode/Dynamic Mode and USB mode...I guess Traditional or Dynamic ..but who could tell me which one is a good choice (Because iprint document was not provide this information)

wyldkao