The 802.1X protocol is a protocol for port based network access control, which was provided by IEEE in March, 2001. Click is a new modular software for building routers, which is characterized by flexible configuration and easy extension.

• 1X协议是IEEE在2001年3月发布的基于端口的网络访问控制协议,Click是一种用于构建路由器的新型模块化软件,具有配置灵活,易于扩展等特点。