CCNA学习指南（英文版 第五版） (2009 年度畅销榜NO.1533 )

世界著名的网络系统公司Cisco公司建立于20世纪80年代，主要致力于开发、生产、销售高档网关、路由器和网络互联设备，其产品广泛应用于局域网、广域网和因特网。在微软公司一方独大的互联网络世界中，Cisco却是路由和交换领域真正的无冕之王。由于Cisco公司的产品不同于普通的计算机软、硬件产品，它的技术含量高，原理复杂，因此学习和掌握其工作原理及使用方法需要许多相关知识和实践经验。为保证使用，管理或提供Cisco产品服务的技术人员能够具备相应的技术水平，Cisco公司设立了一系列认证考试，不仅如此，其考试目标和内容也随其产品不断地发生变化。为覆盖其最新的考试目标，我们采用“原版引进，重新排版印刷”的方式以最快的速度出版Cisco认证考试系列相应科止的辅导丛书来满足读者的需求。本书作为系列中的一本，针对CCNA：640-801考试而推出。书中的内容从联网和TCP/IP的背景开始介绍，接着介绍了子网划分、Cisco网络操作系统和命令行界面，然后讲述了路由和交换，最后介绍了VLAN和WAN等内容。全书篇幅得当，内容新颖实用，不仅适用于网络管理人员、网络设计和开发人员，更是CCNA应试人员的必备材料。

Table of Contents\r\n Introduction\r\n Assessment Test \r\nChapter 1 Internetworking\r\n Internetworking Basics\r\n Internetworking Modls\r\n The Layered Approach\r\n Advantages of Reference Models\r\n The OSI Reference Model\r\n The Application Layer\r\n The Presentation Layer\r\n The Session Layer\r\n The Transport Layer\r\n The Network Layer\r\n The Data Link Layer\r\n Ther Physical Layer\r\n Ethernet Networking\r\n Half-and Full-Duplex Ethernet\r\n Ethernet at the Data Link Layer\r\n Ethernet at the Physical Layer\r\n Ethernet Cabling\r\n Straight-Through Cable\r\n Crossover Cable\r\n Rolled Cable\r\n Wireless Networking\r\n Data Encapsulation\r\n The Cisco Theree-Layer Hierarchical Model\r\n The Core Layer\r\n The Distribution Layer\r\n The Access Layer\r\n Summary\r\n Exam Essentials\r\n Written Lab 1\r\n Written Lab 1.1:OSI Questions\r\n Written Lab 1.2:Defining the OSE Layers and Devices\r\n Written Lab 1.3:Identifying Collision and Broadcast Domains\r\n Review Questions\r\n Answers to Review Questions\r\n Answers to Written Lab 1\r\n Ansers to Written Lab 1.1\r\n Ansers to Written Lab 1.2\r\n Ansers to Written Lab 1.3\r\nChapter 2 Internet Protocols\r\n ……\r\nChapter 3 IP Subnetting and Variable Length Subnet Masks(VLSM)\r\nChapter 4 Introduction to the Cisco IOS\r\nChapter 5 IP Routing\r\nChapter 6 Enhanced IGRP(EIGRP)and Open Shortest \r\nChapter 7 Layer 2 Switching \r\nChapter 8 Virtual LANs(VLANs)\r\nChapter 9 Managing a Cisco Internetwork\r\nChapter 10 Internet Protocols\r\nChapter 11 Wide Area Networking Protocols\r\nAppendix A Commands in This Study Guide\r\nGlossary

Todd lammle已经通过CCNA、CCNP认证，在LAN和WAN领域已经有20多年的经验，从1986年起就与Cisco路由器网络打交道。他是Routersim,LLC公司的CEO,也是Globalnet training公司的总裁。

Welcome to the exciting world of Cisco certification! You have picked up this book because you want something better--namely, a better job with more 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 beneficial to every networking job and is the reason Cisco certification is in such high demand, even at companies with few Cisco devices. Cisco is the king of routing and switching, the Microsoft of the internetworking world. The 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 Cisco world of internetworking. 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 will lead you in that direction.