i am a student who is fascinated in p2p programming , and now is studying the p2p Protocol Gnutella ,using the Phex as the programming source.
My question is
1: how can i know if i am a ultrapeer or a leaf?why dos the program have no prompt when i am converting between leaf and ultrapeer?

2:i know most time i am a leaf,but how can know my Ultrapeer that receive my QRP table to help me to query the other ultrapeer or its other leaves?

3:Generally speaking, a servent is a leaf,which has capable of becoming a UP, but can't have some setting that ensure i am becoming a UP now?(i have wide bandwith now and no firewall, use WinXp Sp2)