BitTorrent Pro is a peer-to-peer file sharing (P2P) communications protocol. BitTorrent is a method of distributing large amounts of data widely without the original distributor incurring the entire costs of hardware, hosting and bandwidth resources. BitTorrent identifies content by URL and is designed to integrate seamlessly with the Web. Its advantage over plain HTTP is that when multiple downloads of the same file happen concurrently, the downloaders upload to each other, making it possible for the file source to support very large numbers of downloaders with only a modest increase in its load. Serving large files creates problems of scaling, flash crowds, and reliability. The key to cheap file distribution is to tap the unutilized upload capacity of your customers. Their contribution grows at the same rate as their demand, creating limitless scalability for a fixed cost.
