关键词: 对等网, 拓扑不匹配, 查询效果, IP地址奇偶性

Abstract: In order to solve the problem of a volume of redundant traffic incurred by the topology mismatch between abstract overlay and physical network in Peer-to-Peer system， an approach based on the property of IP address parity to optimize the P2P’s overlay topology is proposed. This approach based on the IP address’s parity to divide the nodes into two different classes to do different work. The simulations show that this approach reduces the network’s traffic overload and decreases the node’s working load without shrinking the search scope， and shrinking the response-time. This approach can efficiently solve the problem of the topology mismatch between the P2P logical overlay network and the physical underlying network.

Key words: Peer-to-Peer（P2P）, topology mismatch, overlay optimization, parity of IP address