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Research into the hubs in Peer-to-Peer (P2P) networks, and present a new method to avoid generating the hubs in the networks by controlling the logical topology structure of P2P networks. The authors firstly introduce the controlling ideas about hierarchizing the hubs. Then, they disclose and interpret the controlling model, and give out the concrete method to carry it out. Finally, they validate their controlling model via simulations and the simulation results demonstrate that their work is effective to control the hubs in P2P networks. Thus, this model can improve the network competence to defend against coordinated attacks, promote the network robustness, and ensure the network would develop continually and healthily.
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