1. Yes 2. It's up to you. Usually via URLConnections and ObjectStreams (if sending objects). Depends on what kind of data you're sending back and forth. Could also use HTTP or RMI.
Scott Stirling<BR>Author of <A HREF="http://www.amazon.com/exec/obidos/ASIN/067231939X/ref=ase_electricporkchop/107-2476442-4883722" TARGET=_blank rel="nofollow">Java Server Pages Application Development</A>