Download CISCO CCENT/CCNA ICND1, ICND2 640-822, 640-816 Official Cert by Odom W. PDF

By Odom W.

CISCO Официальные руководства по подготовке к сертификационным экзаменам CCENT/CCNA. К каждой книге прилагается CD с вопросами, уроками и бесплатными версиями соответствующих сетевых симуляторов. Также прилагается эмулятор сетевых устройств Boson Netsim.

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Extra info for CISCO CCENT/CCNA ICND1, ICND2 640-822, 640-816 Official Cert Guide book 1

Example text

Just as most people do not really understand how cars work, how TVs work, and so on, most people who use networks do not understand how they work. Nor do they want to! But if you have read this much into Chapter 1, you obviously have a little more interest in networking than a typical end user. By the end of this book, you will have a pretty thorough understanding of what is behind that wall plug in both cases shown in Figure 1-1. The CCNA exams, and particularly the ICND1 (640-822) exam, focus on two major branches of networking concepts, protocols, and devices.

The FTP software on each computer sends the bits that comprise the files by using the networking cards. If Pebbles types a command such as ftp send filename, the software transfers the file called filename to the computer at the other end of the cable. Figure 1-4 depicts the first network test at FredsCo. Figure 1-4 Two PCs Transfer Files in the Lab Network Card Transmit Receive Network Card Transmit Receive Legend: Cable Transmission Path Pebbles’ new networking cards use wire 1 to send bits and wire 2 to receive bits, so the cable used by Pebbles connects wire 1 on PC1 to wire 2 on PC2, and vice versa.

Xliii Part V: Wide-Area Networks ■ Chapter 22, “WAN Concepts,” completes the conceptual materials for WANs for this book, continuing the coverage in Chapter 4, by touching on Internet access technologies like DSL and cable. It also covers the concepts of Network Address Translation (NAT). ■ Chapter 23, “WAN Configuration,” completes the main technical topics of the book, focusing on a few small WAN configuration tasks, plus NAT configuration using Cisco Security Device Manager (SDM). Part VI: Final Preparation ■ Chapter 24, “Final Preparation,” suggests a plan for final preparation once you have finished the core parts of the book, in particular explaining the many study options available in the book.

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