网 络 工 程 师 认 证 练 习 题 手1网络工程师认证(TPCNA-Routing&Switching)练习题手册 目录 计算机网络基础(14%).....................................................................................................................................41.1 计算机网络概述...................................................................................................................................................41.2 网络参考模型.......................................................................................................................................................41.3 IP 地址基础.........................................................................................................................................................41.4 网络通讯协议.......................................................................................................................................................51.5 常见网络拓扑.......................................................................................................................................................6第二章 交换机基本原理(8%).........................................................................................................................................72.1 交换机概述..........................................................................................................................................................72.2 交换机分类..........................................................................................................................................................72.3 二层交换介绍......................................................................................................................................................82.4 三层交换介绍......................................................................................................................................................8第三章 交换机产品线介绍(8%)..........................