http://blog.bittorrent.com/2010/08/13/bittorrent-7-goes-stable/μTP, an updated BitTorrent protocol that makes efficient use of bandwidth while reducing network problems, is a critical component in continuing to drive that legacy forward. μTP is an enhanced BitTorrent transfer protocol that we introduced in our μTorrent client a few months back. While BitTorrent 6.x clients partially supported it, the new BitTorrent 7 client now has support for μTP on a par with the popular μTorrent software
· UDP NAT-traversal – an improved way to find peers who might otherwise be stuck behind firewalls
· Transfer Cap feature – a way to limit the total bytes transferred by your client in a specific period, to keep you in line with any limits imposed by your ISP
· UDP Tracker support – a way to reduce the load on trackers and improve performance
http://blog.bittorrent.com/2010/08/13/bittorrent-7-goes-stable/