P2P Technology And Its Practical Application The Delivery System

This paper mainly explored the application of the P2P technology in the delivery system.In the first place, the concept, principle and key technology of the delivery system were analyzed and introduced, and the existing problems were pointed out as well. Then this paper gave a detailed introduction of the principle and application of the P2P technology, discussed its characteristics and network architecture, and therefore pointed out the problems of this technology. And this paper proceeded to analyze the principle and network architecture of the PCDN technology and its advantages were also analyzed through case study. At the same time, the problems including the content integrity, usability and security were indicated.Through the analysis of the DHT algorithm in the P2P technology, the new node search algorithm, user attestation algorithm, content integrity and usability check algorithm were deduced. With the combination of the central network architecture of the P2P, the architecture, principle and part flow algorithm of the central PCDN and the distributing PCDN were analyzed and explained respectively. At last this paper offered the design and realization code of the key method of the architecture algorithm based on the technology improvement of the PCDN.