No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without the written permission of the publisher, except for the inclusion of brief quotations in a review. This book is designed to provide information about the Cisco Networking Academy course Introduction to Networking. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or suitability is implied.
The opinions expressed in this book are those of the author and are not necessarily those of Cisco Systems, Inc. All terms mentioned in this book that are recognized as trademarks or service marks are written appropriately. The use of a term in this book should not be deemed to affect the validity of any trademark or service mark.
Each book is crafted with care and precision and undergoes rigorous development that incorporates the unique expertise of members of the expert technical community. In 2003, Allan began devoting much of his time and energy to the CCNA Teaching Support Team, providing services to Networking Academy instructors worldwide and creating training materials.
Network Access 141 Objectives 141
Ethernet 209 Objectives 209
Network Layer 273 Objectives 273
IP Addressing 325 Objectives 325
Subnetting IP Networks 403 Objectives 403
Transport Layer 455 Objectives 455
Application Layer 501 Objectives 501
Build a Small Network 533 Objectives 533
Syntax Conventions
Introduction to Networks: Companion Guide v6 is the official companion textbook for the Cisco Network Academy CCNA Introduction to Networks course. As a textbook, this book provides a ready-made reference to explain the same networking concepts, technologies, protocols, and devices as in the online curriculum. This book emphasizes key topics, terms and activities and provides some alternative explanations and examples compared to the course.
You can use the online curriculum as directed by your teacher and then use the study tools in this companion Guide to help strengthen your understanding of all topics.
Who Should Read This Book
Book Features
Topic Coverage
How-to feature: When this book covers a series of steps you need to complete for certain tasks, the text lists the steps as a how-to list. Chapter Summaries: At the end of each chapter you will find a summary of the chapter's key concepts. Practice: At the end of the chapter you will find a complete list of all labs, classroom activities, and Packet Tracer activities that you can refer to for study time.
Readability
Practice
This number refers to the page number in the online course, so you can easily jump to that place online to watch a video, practice an activity, complete a lab, or review a topic.
Labs & Study Guide
About Packet Tracer Software and Activities
Companion Website
Click the "Access Bonus Content" link in the Registered Products section of your account page to be taken to the page where your downloadable content is available. If you are unable to find the files for this title by following the steps, visit www.ciscopress.com/contact and select “Site Problems/.
How This Book Is Organized
Chapter 6, “The Network Layer”: Introduces the function of the network layer—routing—and the basic device that performs this function—the router. Security and network performance issues are examined along with some commands that can be used to review device configuration and network performance. In the next phase of our evolution, innovators will use the Internet as the starting point for their efforts, creating new products and services specifically designed to take advantage of network capabilities.
Class Activity 1.0.1.2: Draw Your Concept of the Internet Refer to Lab Activity for this chapter. The human network focuses on the impact of the internet and networks on people and companies. Hardware often consists of the visible components of the network platform, such as a laptop, PC, switch, router, wireless access point, or the cabling used to connect the devices together.
Satellite – The availability of satellite internet access is a real boon in those areas that would otherwise have no internet connection at all. The services provided by the network must be secure and provide quality of service to meet the organization's expectations. Routers within the network switch packets based on the state of the network at that moment.
The role of the network is transforming to enable the connections between people, devices and information. For example, in the past, a student who needed to access the campus network or the Internet had to use one of the school's computers. Collaboration is defined as "the act of working with another or others on a joint project." Collaboration tools, such as Cisco WebEx shown in Figure 1-29, give employees, students, teachers, customers, and partners a way to instantly connect, communicate with each other, and achieve their goals.
When a dish is "available," the oven sends an alert to the end user's designated device that the dish is ready and heating. Network security implemented must take into account the environment and network tools and requirements. It must be able to secure data while providing the quality of service expected of the network.
There have been many studies showing that the most common data breaches occur because of internal users of the network. Furthermore, the implemented security solution must be adaptable to the growing and changing trends of the network.
CCNA (1.4.4.2)
LAN B. WLAN
Which of the following are business-class Internet connection technologies typically provided by a service provider. Which technology would be best to provide the home user with a fast and always-on internet connection.
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