在当今的信息社会中,无线局域网(WLAN)发挥着越来越重要的作用。它不仅可克服有线网络存在物理环境限制的先天不足,增强网络对环境的适应性,而且能提供良好的可移动性和可配置性,是有线网络有益的补充和扩展。但是无线局域网也存在自身的弱点,如电磁干扰、系统兼容性和安全性 In today’s information society, wireless local area networks (WLANs) play an increasingly important role. It can not only overcome the inherent limitation of the physical environment of the wired network, enhance the adaptability of the network to the environment, but also provide good mobility and configurability, which is a useful supplement and extension of the wired network. However, wireless LANs also have their own weaknesses such as EMI, system compatibility and security