2.12.4 Using your Peers: BitTorrent

• Why not use the other people receiving the content?
• BitTorrent downloads from other machines
• Basic Idea:
  • To download, the host contacts a machine tracking those already downloading the torrent.
  • Peers are selected at random from the tracker.
  • Pieces are selected to download from those available on the downloader's peer set until all pieces of the file have been received