维护岗位认证教材（IP专业）BRAS技术与认证中国电信维护岗位认证教材编写小组编制目录第一章宽带接入服务器原理...........................................................21.1宽带接入服务器定义............................................................21.2宽带接入服务器的系统介绍......................................................31.2.1硬件设计结构.........................................................................31.2.2接口类型和接入方式...................................................................31.2.3接入数量.............................................................................41.3宽带接入服务器的扩展功能......................................................41.3.1业务选择.............................................................................41.3.2QoS支持.............................................................................51.3.3VPN（虚拟专用网络）实现..............................................................51.3.4端口批发.............................................................................51.3.5组播支持.............................................................................51.3.6IP流量的转发管理，实现防火墙功能....................................................6第二章设备功能原理.................................................................62.1设备体系结构.....................................................................6第三章PPP和MP.....................................................................93.1PPP和MP简介....................................................................93.1.1PPP的引入...........................................................................93.1.2PPP的简介..........................................................................103.1.3PPP的基本构架......................................................................103.1.4PPP报文格式........................................................................113.1.5MP简介.............................................................................143.2PPP的运行过程..................................................................143.2.1PPP的协商过程......................................................................143.2.2PPP的PAP验证协议..................................................................163.2.3PPP的CHAP验证协议.................................................................193.3PPP的报文压缩..................................................................22第四章PPPoE.......................................................................234.1PPPoE简介......................................................................234.1.1PPPoE的引入........................................................................234.1.2PPPoE简介..........................................................................234.1.3PPPoE的数据帧......................................................................234.2Discovery阶段..................................................................244.2.1Discovery阶段简介..................................................................244.2.2PADI数据包.........................................................................294.2.3PADO数据包.........................................................................294.2.4PADR数据包.........................................................................30...
