说明：  详细讲述了基于ns2平台的P2P仿真，该文献以freenet为例，演示了ns2P2P仿真的详细过程并做了具体分析，是一篇很好的参考文献。
(Described in detail based on the P2P platform ns2 simulation, the literature to freenet for example, to demonstrate the detailed process simulation ns2P2P and make a specific analysis, is a very good references.)