A standard Peer-to-Peer (P2P) protocol. Gnutella programs include Morpheus, Gnucleus, LimeWire, Phex, Swapper, and XoloX. Issues to be concerned with when P2P programs are used on computers include:
access to pornographic pictures, video, and movies
downloading of copyrighted media which is illegal and can lead to fines
use of computer resources to archive and exchange very large files
the security risk or potential to have any file on your computer shared with other unknown Internet users