P2p Network Search Method In The Remote Examination System

At present, Most of the services on the Internet are based on C/S model, which use centered data storage and network management; but there are increasely a lot of problems such as access delay, communication errors, server overload and unbalanced load, which badly result in local overload, single point failure and low extensibility.P2P network and P2P computing model bring forward an effective way to solve above problems, in the P2P network, every point could be a server or client, which could freely enter into and leave P2P network on its own, get resources and services without the help from server, share information resources. So P2P model is good at decreasing the accesses delay, improving the extensibility, increasing the data consistency and security.First, the paper gives the definition of P2P, classfies of the P2P models and application scopes; Next, by researching the existing P2P applications and implementation, conclude their diferent implementary models, their merits and shortcomings, and also study deeply to their inner mechanisms, at the base of above study, we put forward a mixed resources discovery arithmetic, which integrates the discovery arithmetic of the Flooding and Chord based on distributed hash table, Hence, it has the merit of Flooding in the fast discovery and merit of Chord in avoiding the network storm and extensibility limit; Last, at the base of JXTA and J2SE platform, relying on mixed resources discovery arithmetic, develop and implement the remote test system independed on center server.