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, fr a me 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 descr iption 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.