What is the concept behind torrents..?

• A torrent also known as 'bittorrents’ coordinates the P2P transfer of files. A user playing the role of file-provider makes a file available to the network. 

• This first user's file is called a seed and its availability on the network allows other users, called peers, to connect and begin to download the seed file. 

• As new peers connect to the network and request the same file, their computer receives a different piece of the data from the seed. Once multiple peers have multiple pieces of the seed, BitTorrent allows each to become a source for that portion of the file. 

• The effect of this is to relieve the initial user, distributing the file among the seed and many peers. After the file is downloaded by a given peer, the peer also becomes an additional seed, helping the remaining peers to receive the entire file.