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为同时改善ＬＡＮ的可靠性和传输性能，本文提出了并行容错网络概念，实现了一种带有双传输子网的并行容错局网（Ｐ－ＦＴＬＡＮ）．给出了其功能模式和技术特征，并就其中所涉及的关键技术做了简要介绍．分析表明，本文提出的方法不但为解决ＬＡＮ可靠性提供了一种有效途径，而且对ＬＡＮ的性能有很大的改善．
In order to improve the reliability and transmission performance of LAN at the same time, this paper proposes the concept of parallel fault-tolerant network and implements a parallel fault-tolerant network (P-FTLAN) with dual transmission subnets. Given its functional mode and technical characteristics, and made a brief introduction of the key technologies involved in it. The analysis shows that the proposed method not only provides an effective way to solve LAN reliability, but also greatly improves the performance of LAN.