本书由经验丰富的网络培训公司撰写，主要目的是为读者介绍CLSC考试所必需的知识，以帮助读者顺利通过CLSC考试。本书详细介绍了CLSC考试的各个方面，从如何报名、如何复习到如何考试等等。作者将Cisco局域网交换配置技术与考试目标、练习及自我测试题等形式有机结合，实用又有助于记忆，是CLSC考试人员的必备书。

Welcome to the exciting world of Cisco certification！ You have pickedup this book because you want something better; namely， a better job withmore satisfaction. Rest assured that you have made a good decision. Cisco certification can help you get your first networking job， or more money and a promotion if you are already in the field. Cisco certification can also improve your understanding of the internetworking of more than just Cisco products： You will develop a complete understanding of networking and how different network topologies work together to form a network. This is beneficlal to every networking job and is the reason Cisco certification is in such high demand， even at companies with fewCisco devices. Cisco is the king of routing and switching， the Microsoft of the internetworking world. The new Cisco certifications reach beyond the popular certifications， such as the MCSE and CNE， to provide you with an indispensable factor in understanding today's network-insight into the Clsco world of intemetworking. By deciding that you want to become Cisco certified， you are saying that you want to be the best-the best at routing and the best at switching. This book can lead you in that direction.

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本书详细讲解了Cisco连网操作系统（IOS）的IP命令与各种特性配置方法，内容深入浅出，实用性强。书中运用大量的实例，并且涵盖了IOS 11版本和IOS 12版本命令的详细解释。即使网络初学者也可通过书中实例按步操作，从中受益。此书是IOS和IP协议最可靠、最有用的日常参考手册。

本书是CCNA 2.0认证考试的备考资料，讲述了Cisco路由器、TCP/IP编址。IPX/SPX协议及AppleTalk的有关知识，同时提供了大量的实验和练习，具有很强的实用性。本书适于广大CCNA 2.0认证考试人员及网管人员参考。

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考试号350-001。本书系Cisco认证考试系列之一，覆盖所有的CCIE考试内容，包括有复习重点及模拟试题。

本书按照全国计算机等级考试最新大纲规定的三级（A类）等级考试内容要求，精心设计了30套自练自测模拟笔试试卷（每套题均附有答案），供考生一日一测，使考生的应试水平在一个月之内见成效，掌握过关致胜之技能。书中试题突出考点、重点、难点，针对性强，题型标准，应试导向准确。本书适合与教育部考试中心编写的《全国计算机等级考试三级A类教程》一书配套使用。

本书是一本英文的计算机网络交换器水平考试的自学参考资料。

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