Peer-to-Peer (or P2P) From user to user. Peer-to-peer implies that either side can initiate a session and has equal responsibility. Corey Chan Andrew Merfeld.
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Presentation on theme: "Peer-to-Peer (or P2P) From user to user. Peer-to-peer implies that either side can initiate a session and has equal responsibility. Corey Chan Andrew Merfeld."— Presentation transcript:
1 Peer-to-Peer (or P2P)From user to user. Peer-to-peer implies that either side can initiate a session and has equal responsibility.Corey ChanAndrew MerfeldCharlie Yung
2 Overview for today Napster Kazaa/Limewire BitTorrent Future of P2P Networks
4 Napster’s Features Started file sharing Easy to search FREE music Limited to MP3 downloads only
5 Napster’s Architecture Log on to computer.2. Your computer connects to Napster Central Server.3. Central Server returns complete list of songs.4. User searches for the song.5. Your computer connects to other users computer.6. Downloads songs from other user computer.
6 Napster’s Legal Issues Music Companies sues Napster, because the artist did not get paid for songs being traded for free.Court Order shut down Napster for violating copyright infringement.Forced to shut down music sharing in July 2002.Napster ost a lot of money and users.
7 New Napster Paid membership Partnership with music companies to distribute music.Offer legal music
9 Kazaa/Limewire Features Download music, video, text, pdf, possiblities endless, including virusesMost at risk with security and some clients include spywareEasy to use
10 Napster vs Kazaa/Limewire CentralizedQuicker search/response timeDe-CentralizedHarder to stop
11 How to Download a FileSimply open client software, type in a search requestThat client searches for the file on their hard drive, and passed request onto all the computers its connected toRequest gets forwarded deeper and deeper, typically 6-7 levelsTTL (time to live) limits how long search request goes for
12 Legal ImplicationsUnlike the Napster system, clients are direct targetsRIAA (Recording Industry Association of America) has sued clients for an average of $3,000 per userMPAA (Motion Pictures Association of America) has begun to target & warn clients as well.
14 BitTorrent History Who developed BitTorrent? When it was developed? A: Bram CohenWhen it was developed?~2002Is it a defacto?Could say so..Photo by Frank Ockenfels 3; Stylist/Groomer: Amanda Stansfield. Issue 13.01: The Wired magazine.
15 How BitTorrent is used: .torrent files located on the webCan be found through BitTorrent search enginesDownload process BitTorrent program opens up .torrent file to retrieve information about download fileUpload process happens simultaneously with the download
16 What BitTorrent is: Protocol for transferring any type of files Peer-to-peer networkingCentralized server Full Mesh topologyTracker file used to define information being sent “the packets” in a network
17 BitTorrent Network Structure shown with centralized serverdirecting tracking informationto computers in P2P network.From “NTL And BitTorrent Announce P2P File-Sharing Trial” Feb
18 BitTorrent vs. KazaaBitTorrent allows users to connect to each other through a torrent source file for maximum bandwidth allowancesHas the ability to upload impartial pieces of the targeted file for downloadKazaa connects through many users but doesn’t take advantage of BitTorrent’s download/upload efficiency technologyFiles must be complete for uploading
19 BitTorrent Contrast Advantages: Disadvantages Faster speeds (compared to Kazaa)Connection efficiencyReliableMany search engines to find filesDisadvantagesDifficulty level of starting a torrent to shareHurts music, movie industryMore complicated process to download files
20 Future for P2P Networks Darknets – private peer to peer networks “Underground” compared to open networksInvitation only by the operatorsMostly programmers start Darknets“A darknet as a group of individuals who have a covert, dispersed communication channel.” ~Eric Cole of Lockheed Martin, advanced technology company