IEEE 802.1x is standard for port-based network access control that provides authenticated network access to 802.11 wireless networks and wired Ethernet networks. It provides a simple WLAN Security Solution by using the physical characteristics of switched LAN infrastructure into authenticate devices that are attached to a LAN-Port. IEEE802.1X提供对802.11无线局域网和有线以太网的访问认证,使用LAN交换机底层的物理特性来鉴别对LAN端口的访问,是WLAN安全性解决方案中最为简化的可行性方案。