Social networking in P2P systems.
Ritesh Kalra · DR-NTU (Nanyang Technological University) · 2011
The first generation peer-to-peer file sharing networks, such as Napster, relied on a central database to co-ordinate look ups on the network. The second generation peer to-peer networks such as Gnutella used flooding to locate files, searching every node on the network. Third generation peer-to-peer networks use Distributed Hash Tables to look up files in the network. Distributed Hash Tables store resource locations throughout the network. A major criterion for these protocols is locating the desired nodes quickly. Various structured and unstructured DHT protocols are used in the implementation of P2P network. Some of them are Tapestry, Chord, Pastry, Kademlia etc.