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基于局域网的工作站机群（NOW），以其巨大的计算潜力、良好的性能价格比、可扩展性又灵活的体系结构而受到人们的重视。要建立有良好并行性能的NOW通用系统，必须解决许多问题，如工作站间通信开销大的问题。负载平衡问题、异构、容错等问题。文章较详细地讨论了在实现NOW系统存在的一些通信问题，并分析了国内外对此所做的一些工作。
LAN-based workstation fleet (NOW), with its huge computing potential, good cost performance, scalability and flexibility of the system by people’s attention. To build a NOW generic system with good parallel performance, many issues must be addressed, such as the large communication overhead between workstations. Load balancing, heterogeneous, fault tolerance and other issues. The article discusses some communication problems existing in NOW system in more detail and analyzes some work done at home and abroad.