The only authorized textbook for the Cisco Networking Academy Program</P>
This revised and expanded edition, which has 1:1 chapter-to-online module alignment, contains many learning aids that have been redesigned to help you reinforce the material in the course, focus on important concepts, and organize your study time for exams.</P> <UL> <LI>Chapter Objectives are stated as questions at the beginning of each chapter. The objectives cover only the topics that are critical to passing the certification exam. The question format encourages you to think about finding the answers as you read through the chapter's content. <LI>Additional Topics of Interest is a new feature that indicates related information provided in the chapter that is not pertinent to pass the certification exam but would certainly be worthy to know on the job. <LI>Key Terms are now also listed at the beginning of each chapter in order of occurrence to alert you to the technical vocabulary that you need to understand as you work through that chapter. Key terms are then highlighted at first reference and defined at the end of the corresponding chapter. At the back of this book, an extensive Glossary collects all the key terms and their definitions. <LI>Check Your Understanding questions with an answer key help you keep track of your progress and aid studying for the assessments.</LI></UL>
Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Revised Third Edition, is the Cisco approved textbook to use alongside version 3.1 of the Cisco Networking Academy Program CCNA 1 and CCNA 2 web-based courses. The topics covered provide you with the necessary knowledge to begin your preparation for the CCNA certification exam (640-801, or 640-821 and 640-811) and to enter the field of network administration.</P>
As in the courses, the CCNA 1 section covers networking basics, including the basics of Ethernet technologies, TCP/IP, network media, IP addressing, and routing. The CCNA 2 section covers routers and routing basics, including the basics of configuring routers, routing protocols, more TCP/IP concepts, access control lists, and networking troubleshooting skills.</P>
Use this Companion Guide as a portable desk reference to access the information for study and review at any time!</P>
In addition, new icons throughout this Companion Guide refer you to additional skill-building activities found on the companion CD-ROM or in the separate Lab Companion.</P>
Companion Titles for CCNA 1 and 2:</P>
Cisco Networking Academy Program
CCNA 1 and 2 Lab Companion Revised Third Edition
ISBN: 1-58713-149-8</P>
Cisco Networking Academy Program
CCNA 1 and 2 Engineering Journal and Workbook Revised Third Edition
ISBN: 1-58713-151-X</P>
Companion CD-ROM
This CD-ROM includes 25 new Interactive Media Activities, a customizable test engine with more than 250 practice questions, 10 PhotoZooms of Cisco equipment, 25 instructional Videos and Animations, and the Case Study Materials files you will need. PLUS Packet Tracer 3.2 is included, which is a Flash-based simulation environment to design, configure, and troubleshoot CCNA-level networks and animate packet flow. Also included is a special offer to save at ciscopress.com.</P>
This book is part of the Cisco Networking Academy Program Series from Cisco Press. The products in this series support and complement the Cisco Networking Academy Program.</P>
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这本书的排版和装帧设计简直是灾难性的,拿到手的第一感觉就是“这真的是一个价值不菲的官方学习资料吗?”纸张质量粗糙得令人发指,油墨似乎总是印不均匀,尤其是在涉及到那些需要精确辨识的拓扑图和配置示例时,细节模糊不清,简直是强迫我们这些初学者去猜测那些关键的端口号或者IP地址。更要命的是,章节之间的过渡生硬得像生硬地用刀子切开一样,完全没有照顾到读者的认知曲线。比如,前一章还在讲最基础的OSI模型概念,下一章突然就跳到了复杂的路由协议配置,中间缺少了大量必要的衔接和铺垫,让人感觉像是在爬一个陡峭的悬崖,而不是在循序渐进地学习。如果你指望通过这本书的视觉呈现来建立对网络世界的直观印象,那注定会大失所望。它更像是一份未经打磨的、匆忙付印的内部文档,而非一本精心策划的教学指南。我对这种对待学习材料的态度感到非常失望,这直接影响了阅读体验和知识吸收的效率,使得每一次翻页都变成了一种对抗。
评分从叙事风格和语言组织的角度来看,这本书枯燥到了一个极点,简直是技术文档的典范——如果你的目标是让读者在三页之内睡着的话。句子结构冗长且充满了被动语态,仿佛作者在刻意避免使用任何可能激发读者兴趣的词汇。阅读这本书与其说是在学习网络知识,不如说是在进行一项耐力挑战。每当我想深入了解某个协议的运作原理时,我发现作者只是简单地引用了RFC标准中的某一部分,然后就跳过了实际的数据包是如何封装和转发的生动细节。这种“把事实摆在你面前,你自己去领悟”的处理方式,对于需要高强度激励才能坚持下去的自学者来说,无疑是巨大的打击。它缺少了那种能够将冰冷的技术概念赋予生命力的叙事技巧,让人感觉自己像是一个在被动接收数据的机器,而不是一个积极探索网络的未来工程师。
评分这本书的示例代码和实验指导部分是其最致命的弱点之一,简直是信誉的巨大透支。我花了好几个小时试图重现书上描述的某个特定子网划分的练习,结果发现书中的默认网关设置和实际操作环境之间存在着微妙但关键的偏差。这些偏差导致我的模拟器(无论是Packet Tracer还是GNS3)总是报错,而书中对此的解释却轻描淡写,仿佛这些错误只是读者粗心造成的。更令人沮丧的是,对于一些至关重要的命令参数,它只是简单地列出了语法,却没有详细说明在不同网络规模或安全策略下,我们应该如何权衡选择不同的可选参数。这使得学习过程充满了试错的痛苦,而不是结构化的技能培养。一个权威的“指南”理应提供经过充分验证的、可立即复现的实践路径,但这本书在这方面表现得极其不负责任,迫使学习者不得不花费大量时间去调试那些本应是书中就已经解决的问题。
评分我必须指出,这本书对于新版网络技术和安全实践的跟进速度显得严重滞后,这在快速迭代的IT领域是不可接受的。当我尝试将其中学到的某些配置方法应用于最新版本的网络设备操作系统时,发现许多CLI命令已经被废弃或者有了更优化的替代方案。虽然它声称是“修订版”,但这种修订似乎只是对旧有框架进行的最小化修补,而非一次彻底的现代化改造。特别是关于新兴的SDN概念和云网络集成的内容,描述得极其肤浅,甚至可以说是蜻蜓点水,完全无法满足当前业界对全栈网络工程师的要求。对于希望通过这本书为进入现代企业网络环境做准备的人来说,它提供的知识可能在很大程度上已经过时,甚至可能引导学习者走向一些不再被推荐的最佳实践。选择一本更加与时俱进的教材,恐怕是更明智的投资。
评分对于我这种希望通过自学来掌握CCNA核心知识体系的人来说,这本书的理论深度和广度实在是让人感到力不从心,它似乎完全是为课堂环境和有经验的讲师量身定做的。内容本身堆砌了大量的技术术语和定义,但这些定义往往缺乏足够生动和贴近实际场景的解释。举个例子,当它试图讲解VLAN间路由时,理论描述冗长而抽象,直到我翻阅了外部的博客和视频教程,才真正理解了“Router-on-a-stick”是如何在逻辑上运作的。这本书似乎默认读者已经具备了某种IT背景知识,或者说,它过于依赖于课堂上的即时问答和演示环节来弥补其文本阐述的不足。结果就是,对于一个完全的新手来说,这本书读起来就像是在啃一块难以咀嚼的干硬面包,充满了技术名词的轰炸,却缺少了那种“啊哈,原来是这样!”的顿悟时刻。它的组织结构更像是一个百科全书式的条目罗列,而不是一个引导性的学习路径图。
评分中文版翻译得也不错,比较细致...
评分中文版翻译得也不错,比较细致...
评分中文版翻译得也不错,比较细致...
评分中文版翻译得也不错,比较细致...
评分中文版翻译得也不错,比较细致...
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