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Bittorrent

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Bittorrent

Bittorrent


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  • 1. Peer-to-Peer Networks
  • 2. • • • • Client-Server Model Central server store the files Large traffic to the server will lead to download failure. Shortcomings of FTP makes people to think over traditional FTP.
  • 3. •Network built and sustained by the resources of each participant. •Peers act as both client and server. •Centralized/decentralized models.
  • 4. Napster • Gnutella (Bearshare, Limewire) • Kademlia (Overnet, eDonkey) • Fasttrack (Kazaa) • Bit torrent •
  • 5. • • • • • • Created by Bram Cohen P2P(Peer To Peer) file transfer protocol Transfer of large files Files are shared by many users Active participation of all users Huge success in file sharing domain since 2003
  • 6.  This refers to the small metadata file you receive from the web server (the one that ends in .torrent)  Metadata here means that the file contains information about the data you want to download, not the data itself.
  • 7. WHAT DOES IT CONTAIN??? info: a dictionary that describes the file(s) of the torrent. announce: contains the URL of the “tracker”. creation date Comments from the author (optional) created by (optional) piece length: number of bytes in each piece (integer). pieces: string consisting of the concatenation of all 20byte SHA1 hash values, one per piece. • private: (optional) is a field where the client requests to avoid publicising it’s request. • • • • • • •
  • 8. • A peer is another computer on the internet that you connect to and transfer data. • They are similar to peers in that they won’t have the complete file. But the main difference between the two is that a leech will not upload once the file is downloaded. • A computer that has a complete copy of a certain torrent. Once a client downloads a file completely, he can continue to upload the file which is called as seeding..
  • 9. A server on the Internet that acts to coordinate the action of BitTorrent clients. The clients are in constant touch with this server to know about the peers in the swarm.
  • 10. The group of machines that are collectively connected for a particular file.
  • 11. Visualization
  • 12. • • • • • First download a Torrent client to do us the job of downloading the files Then, go to a good Torrent search engine Download the file with '.torrent' extension Open it in your client If the download starts with the progress bar moving, take a deep breath!
  • 13. • • • • • • • • Deluge Transmission Ktorrent Vuze qBittorrent Bittorrent Bitcomet µtorrent
  • 14. • • • • • • torrentz.com piratebay.org mininova.com isohunt.com extratorrent.com kickass.to
  • 15. • The BITTORENT protocol (the technology) - No laws against file-sharing standards • The BITTORENT client program - Similarly, the client software does not do anything illegal • *.TORRENT meta-files/trackers - A grey area • Content files - It is illegal to download/upload copyright material.

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