Bittorrent DNA is a content delivery system that reduces publisher server load by using Bittorrent P2P deliver. It is used only for content that you request. You can find more details over here .
Enable DNA powered downloads : this enables the DNA functionality in uTorrent.
Limit DNA uploads to : you can choose to limit the amount of upload you are willing to allow to other users
DNA Options
- Alert me when DNA-powered downloads are added to uTorrent : Check this to be notified when a DNA download starts.
- Disable Screen-Saver while streaming content with DNA : allows you to specify not to turn the screen off while you intend to watch and stream DNA content.