peer to peer networks november 28, 2007 jenni aaker david mize
TRANSCRIPT
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Peer to Peer Networks
November 28, 2007Jenni AakerDavid Mize
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Outline
• Definition of P2P• P2P vs. Client/server• Sharing Large Files• Security and Risks• Applications• Discussion: current P2P issues• Survey results
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Peer to Peer Networks (P2P)
“A method of file sharing over a network in which individual computers are linked via the
Internet or a private network to share programs/files. Users download files directly
from other users' computers, rather than from a central server.”
-Harvard information technology Department
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P2P structure
Nodes ( computers )communicating to each other through with out dedicated servers or hierarchy
Nodes work as both clients and servers to the other nodes in the network
Users decide what can and can’t be accessed
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VS.
P2P vs. Client/Server Networks
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Using P2P to share /large files
• To share large files from one node to another would use too much bandwidth and take to long. To solve that BitTorrent is a method of distributing large amounts of data widely without the original distributor incurring the entire costs of hardware, hosting and bandwidth resources
• The more nodes in a network the quicker and more efficient the file will travel
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Risks of P2P
• poisoning attacks• polluting attacks• freeloaders• insertion of viruses to carried data• malware in the peer-to-peer network software itself• denial of service attacks• filtering• identity attacks• spamming
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How to Protect Yourself
• Don't Use P2P On a Corporate Network
• Beware The Client Software
• Don't Share Everything
• Scan Everything
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How to protect your Business
• Attempt to control your desktops to prevent P2P software from being installed
• Limit the traffic at the firewall
• Educate your users!!!
Ex: Japanese Policeman
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Applications
• Limewire - File Sharing • BitTorrent – File Sharing• Joost - P2P TV• Skype - P2P Phone
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Discussion: current P2P issues
• Comcast Sued for Blocking P2P Sites
• Anti-P2P college bill advances in House
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Survey ResultsAny specific questions that you want answered
from the readings?
• Nope
• I'd like to know more about Joost
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Peer to Peer Networks
What is it? Current issues
Applications
Risks?
How does it work?
Small connections
Large files, BIT Torrent Protect your
business
Protect yourself
File sharingLegal P2P
sites?
Phone, TV, media
Large Networks
Basic