Peer-to-peer systems are often implemented as an abstract overlay network built at the application layer on top of the native or physical network.

对等系统常常实现为一个抽象的覆盖网络，构建于原生或物理网络之上的应用程序层上。

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Based on the advantages of both Grid and peer-to-peer (P2P) networks, an overlay network in the Grid environment is constructed by P2P technologies by a modified version of the Chord protocol.

在结合网格与P 2 P网络技术优势的基础上，提出一种在网格环境下基于P 2 P技术的覆盖网络构建机制。

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