P 2 P网络结构中不存在集中式服务器，每个节点既是一个信息消费者，同时也作为一个信息提供者，任何节点所拥有的权利和义务都是对等的。
There is no centralized server in P2P network, and each node is an information consumer, but also an information provider, the rights and obligations of node are equal.
将整个系统从逻辑上分为三层：集中式P 2 P网络结构、集中式P 2 P分组、结构化分布式P 2 P网络群。
The whole system were logically divided into three parts: the centralized P2P network structure, the centralized P2P grouping and the structured distributed P2P network team.
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