How does Spark transfer files from a user to another?

Discussion created by eway on Jun 5, 2006
Latest reply on Jun 5, 2006 by AWenckus

I''m studying the jabber tech. I think file transmission should not be the same as the message(delivered by server), it should be done by peer to peer.

If it''s true, and how does spark implement it? How does spark solve the NAT&firewall issues?