说明：  本书详细介绍CCNA考试的内容，主要有：互连网络的模型、Cisco路由器、交换机和集线器的特点；Cisco IOS软件的初步知识；TCP/IP协议套件的综合概括；管理广域网，配置ISDN、帧中继和ATM；学习IP配置；Novell IPX协议栈、IPX封装类型和SAP及RIP的配置；使用访问表进行基本的通信量管理；默认的局域网连网，跨域配置VLAN。 在每一章中，均有针对认证目标的详细说明、有关认证的总结信息、2分钟练习和自我测试题，可帮助读者更好地理解认证的内容。
(The book details the contents of CCNA exam, are: the model of interconnection networks, Cisco routers, switches and hubs characteristics Cisco IOS software, the initial knowledge TCP/IP protocol suite summarize management of WAN, Configure ISDN, Frame Relay and ATM learning IP configuration Novell IPX protocol stack, IPX packaging type and the configuration of SAP and RIP use access table basic traffic management default LAN networking, cross-domain configuration VLAN. In each chapter, the goals are for a detailed description of certification, the certification of the summary of information, 2 minutes exercise and self-test questions to help readers better understand the content of certification.)