Client-Server

• individual clients

• ​requests

• resources

• centralized servers

P2P

• distributed application architecture

• Peers are both suppliers and consumers of resources

History

• World Wide Web was close to a P2P network

  • active editor and contributor

  • creating and linking content

• ARPANET: a precursor to the Internet: 

  • a successful client-server network

• USENET

  • a distributed messaging system 

  • described as an early peer-to-peer architecture

Applications

• Multimedia

• Bitcoin

• Dalesa: web cache for LANs

• Tor: anonymity network

• FireChat: mobile application.

• Windows 10: "Delivery Optimization"

• FAROO: web search engine

• ...