8 - P2P - Last Lecture SMTP SUNY at Buffalo; CSE 489/589...

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Last Lecture SMTP SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 1
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This Lecture Peer-to-Peer (P2P) Applications SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 2
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Internet Traffic Trend SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 3 Don’t take the numbers too seriously
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08 vs. 07: P2P, porn down; games and Flash up SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 4 http://arstechnica.com/web/news/2009/02/internet-traffic-report-p2p-porn-down-games-and-flash-up.ars
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What is P2P Architecture? SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 5 o No always-on server o Arbitrary end systems directly communicate o Peers are intermittently connected and change IP addresses o Apps that use P2P File sharing Searching for information Internet telephony (e.g., Skype) peer-peer
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Why P2P? Client-Server vs. P2P SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 6 Question : How much time to distribute file from one server to N peers ? u s u 2 d 1 d 2 u 1 u N d N Server Network (with abundant bandwidth) File, size F u s : server upload bandwidth u i : peer i upload bandwidth d i : peer i download bandwidth
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SUNY at Buffalo; CSE 489/589 – Modern Networking Concepts; Fall 2010; Instructor: Hung Q. Ngo 7 u s u 2 d 1 d 2 u 1 u N d N Server Network (with abundant bandwidth) F o Server sequentially sends N copies: NF/u s time o Client i takes F/d i time to download
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This note was uploaded on 12/03/2010 for the course CS 489 taught by Professor Hungngo during the Fall '10 term at SUNY Buffalo.

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8 - P2P - Last Lecture SMTP SUNY at Buffalo; CSE 489/589...

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