BitTorrent is a peer-to-peer file sharing protocol allowing users to distribute large amounts of data without putting the level of strain on their computers that would be needed for standard Internet hosting.
Peer-to-peer file sharing is different from traditional file downloading. In peer-to-peer sharing, you use a software program (rather than your Web browser) to locate computers that have the file you want. Because these are ordinary computers like yours, as opposed to servers, they are called peers.
Share ratio – The ratio is the amount of data a user has uploaded divided by the amount of data they have downloaded for a particular torrent (UL÷DL).
Index – An index is, as the name implies, a searchable list of .torrent files, hosted on a website.
All peers act as a source Peers exchange different pieces of the file with one another until they assemble a whole As soon as the user has a piece of the file on his machine, he can become a source of that piece to other peers, helping speed download Seed A machine with a complete copy (the seed) can distribute incomplete pieces to multiple peers