Date Added: Dec 2011
Peer-to-Peer systems have become, in a short period of time, one of the fastest growing and most popular applications. The decentralized and distributed nature of P2P systems leads to living aside the client-server model. In P2P model each node takes both the roles of client and server. As a client, it can query and download its wanted data files from other nodes and as a server, it can provide data files to other nodes. Two main objectives in p2p systems are data location and search for interesting data. In order to present these topics, this paper will focus on the issue of peer-to-peer session state service for networks, which will provide the security and good service.