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Peer to peer


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Peer to peer

  1. 1. Peer to Peer File Sharing Da Ren Yang 100595375 Hao Nan Zhou 100639566
  2. 2. Table of contents <ul><li>Definition </li></ul><ul><li>History </li></ul><ul><li>Advantage </li></ul><ul><li>Issue </li></ul><ul><li>Conclusion </li></ul><ul><li>Reference </li></ul>
  3. 3. Definition <ul><li>A peer-to-peer (P2P) is a distributed network structure that clients make a portion of their resources directly available to other network clients , without the need for server or stable host. </li></ul>
  4. 4. P2P vs. HTTP Peer to Peer Model (1) (2)
  5. 5. History <ul><li>USENET (1979) </li></ul><ul><ul><li>No PC at that time </li></ul></ul><ul><li>Napster (1999) </li></ul><ul><li>created by Shawn Fanning </li></ul>(3)
  6. 6. History <ul><li>eDonkey (2000) </li></ul><ul><ul><li>Created by Jed McCaleb nad Sam Yagan </li></ul></ul><ul><ul><li>Ed2k server </li></ul></ul>(4)
  7. 7. History <ul><li>eMule (2002) </li></ul><ul><ul><li>Created by Hendrik Bretkreuz </li></ul></ul><ul><ul><li>Ed2k and Kad net </li></ul></ul>(5)
  8. 8. History <ul><li>BitTorrent (2002) </li></ul><ul><ul><li>Created by Bram Cohen </li></ul></ul><ul><ul><li>Torrent file (bitcomet, uTorrent , etc.) </li></ul></ul><ul><ul><li>50~70 % of p2p i nformation f low now </li></ul></ul>(6)
  9. 9. Advantages <ul><li>A ll clients provide resources </li></ul><ul><ul><li>No bandwidth limit (more clients, fast the download speed) </li></ul></ul><ul><ul><li>Storage space </li></ul></ul><ul><ul><li>More resource links </li></ul></ul>
  10. 10. Issue <ul><li>Always related to pirate </li></ul><ul><li>Most movies, games, and programs shared in p2p applications are illegal copies . </li></ul><ul><li>“ Pirate to Pirate” </li></ul>
  11. 11. Issue <ul><li>Napster stopped its free service in 2001. </li></ul><ul><ul><li>Warner Music , Sony Music , and other 5 big music companies have sue d Napster 7 times since 1999. </li></ul></ul><ul><li>eDonkey p ermanently closed in 2005 </li></ul><ul><ul><li>lose a lawsuit , and pay $30 million to Recording Industry Association of America (RIAA) </li></ul></ul>
  12. 12. Issue <ul><li>eMule and BitTorrent still works </li></ul><ul><ul><li>Free open source program </li></ul></ul><ul><ul><li>Non Commercial purposes </li></ul></ul><ul><ul><li>User agreement </li></ul></ul><ul><ul><li>Download agreement </li></ul></ul>
  13. 13. Conclusion <ul><li>Peer-to-Peer application itself is innocent. </li></ul><ul><li>The criminals are the users (some) </li></ul><ul><li>Even though bad things happened all the time, we need this technology. </li></ul>
  14. 14. References <ul><li>1) </li></ul><ul><li>2) </li></ul><ul><li>3) </li></ul><ul><li>4) </li></ul><ul><li>5) </li></ul><ul><li>6) </li></ul>
  15. 15. End <ul><li>Are there any questions? </li></ul>Thank You