sentences:  The research analyzed Gnutella and eMule protocols and found weaknesses in the protocol; many of the issues found in these networks are fundamental and probably common on other P2P networks.Users of file sharing networks, such as eMule and Gnutella, are subject to monitoring of their activity.Clients may be tracked by IP address, DNS name, software version they use, files they share, queries they initiate, and queries they answer to.