1. File Distribution BitTorrents Mike Bohrer BitTorrents Mike Bohrer

2. What is it!  BitTorrent is a peer-to-peer (P2P) file distribution protocol. The protocol was originally designed and created by programmer Bram Cohen and licensed under the Open Source License.  The point of the software is that you can’t download files unless your sharing!  BitTorrent is a peer-to-peer (P2P) file distribution protocol. The protocol was originally designed and created by programmer Bram Cohen and licensed under the Open Source License.  The point of the software is that you can’t download files unless your sharing!

3. Seeding Tracker site peer list seed Web site Some_file.torrent

4. How it Works 345... peer list I am here! peer list Seed(s) Tracker site download Some_file.torrent Web site Some_file.torrent

5. Business Applications  College  Distribution of large files between campus’s  Commercial  YouTube, Amazon S3, MPAA  College  Distribution of large files between campus’s  Commercial  YouTube, Amazon S3, MPAA

6. Significant Limitations  Tracker  Down time, Corrupt tracker  Flash Sharing  Avg: torrent lasts about 8 days  Commercial / Personal  Users who stop contributing after finishing the file(s) hurt the virtual network.  Tracker  Down time, Corrupt tracker  Flash Sharing  Avg: torrent lasts about 8 days  Commercial / Personal  Users who stop contributing after finishing the file(s) hurt the virtual network.

7. Conclusion  Evolution of sharing information  Movies  Evolution of sharing information  Movies