CCENT/CCNA ICND1 Official Exam Certification Guide (CCENT Exam 640-822 and CCNA Exam 640-802)

926 Pages·2007·8.01 MB·English

by  Odom, Wendell

CCENT/CCNA ICND1

Official Exam Certification Guide,
Second Edition
Wendell Odom,
CCIE No. 1624
Cisco Press
800 East 96th Street
Indianapolis, Indiana 46240 USA
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CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition
Wendell Odom
Copyright© 2008 Cisco Systems, Inc.
Published by:
Cisco Press
800 East 96th Street
Indianapolis, IN 46240 USA
All rights reserved. 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 written
permission from the publisher, except for the inclusion of brief quotations in a review.
Printed in the United States of America
Eighth Printing September 2009
Library of Congress Cataloging-in-Publication Data.
Odom, Wendell.
CCENT/CCNA ICND1 official exam certification guide / Wendell Odom.
p. cm.
ISBN 978-1-58720-182-0 (hardback w/cd) 1. Electronic data processing personnel--Certification. 2. Computer net-
works--Examinations--Study guides. I. Title.
QA76.3.O358 2007
004.6--dc22
2007029241
ISBN-13: 978-1-58720-182-0
ISBN-10: 1-58720-182-8
Warning and Disclaimer
This book is designed to provide information about the Cisco ICND1 (640-822), ICND2 (640-816), and CCNA
(640-802) exams. Every effort has been made to make this book as complete and accurate as possible, but no warranty
or fitness is implied.
The information is provided on an “as is” basis. The author, Cisco Press, and Cisco Systems, Inc. shall have neither
liability nor responsibility to any person or entity with respect to any loss or damages arising from the information
contained in this book or from the use of the discs or programs that may accompany it.
The opinions expressed in this book belong to the author and are not necessarily those of Cisco Systems, Inc.
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Trademark Acknowledgments
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capitalized. Cisco Press or Cisco Systems, Inc. cannot attest to the accuracy of this information. Use of a term in this
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Publisher:Paul Boger Copy Editor: Gayle Johnson and Bill McManus
Associate Publisher: Dave Dusthimer Technical Editors: Teri Cook, Brian D’Andrea,
and Steve Kalman
Cisco Representative: Anthony Wolfenden Editorial Assistant: Vanessa Evans
Cisco Press Program Manager: Jeff Brady Book and Cover Designer: Louisa Adair
Executive Editor: Brett Bartow Composition:ICC Macmillan Inc.
Managing Editor: Patrick Kanouse Indexer:Tim Wright
Senior Development Editor: Christopher Cleveland Proofreader: Suzanne Thomas
Senior Project Editor: San Dee Phillips and Meg Shaw
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About the Author
Wendell Odom, CCIE No. 1624, has been in the networking industry since 1981. He
currently teaches QoS, MPLS, and CCNA courses for Skyline Advanced Technology
Services (http://www.skyline-ats.com). He has also worked as a network engineer,
consultant, systems engineer, instructor, and course developer. He is the author of all
previous editions of the CCNA Exam Certification Guide, as well as the Cisco QOS Exam
Certification Guide, Second Edition, Computer Networking First-Step,CCIE Routing and
Switching Official Exam Certification Guide, Second Edition, and CCNA Video Mentor—
all from Cisco Press.
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About the Technical Reviewers
Teri Cook (CCSI, CCDP, CCNP, CCDA, CCNA, MCT, and MCSE 2000/2003: Security)
has more than ten years of experience in the IT industry. She has worked with different
types of organizations in the private business and DoD sectors, providing senior-level
network and security technical skills in the design and implementation of complex
computing environments. Since obtaining her certifications, Teri has been committed to
bringing quality IT training to IT professionals as an instructor. She is an outstanding
instructor who uses real-world experience to present complex networking technologies. As
an IT instructor, Teri has been teaching Cisco classes for more than five years.
Brian D’Andrea(CCNA, CCDA, MCSE, A+, and Net+) has 11 years of IT experience in
both medical and financial environments, where planning and supporting critical
networking technologies were his primary responsibilities. For the last five years he has
dedicated himself to technical training. Brian spends most of his time with The Training
Camp, an IT boot camp provider. Using his real-world experience and his ability to break
difficult concepts into a language that students can understand, Brian has successfully
trained hundreds of students for both work and certification endeavors.
Stephen Kalman is a data security trainer. He is the author or tech editor of more than
20 books, courses, and CBT titles. His most recent book is Web Security Field Guide,
published by Cisco Press. In addition to those responsibilities he runs a consulting
company, Esquire Micro Consultants, which specializes in network security assessments
and forensics.
Mr. Kalman holds SSCP, CISSP, ISSMP, CEH, CHFI, CCNA, CCSA (Checkpoint), A+,
Network+ and Security+ certifications and is a member of the New York State Bar.
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Dedication
For Brett Bartow. Thanks for being such a steady, insightful, and incredibly trustworthy
guide through the publishing maze.
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Acknowledgments
The team who helped produce this book has been simply awesome. Everyone who touched
this book has made it better, and they’ve been particularly great at helping catch the errors
that always creep into the manuscript.
Brian, Teri, and Steve all did a great job TEing the book. Besides helping a lot with
technical accuracy, Brian made a lot of good suggestions about traps that he sees when
teaching CCNA classes, helping the book avoid those same pitfalls. Teri’s ability to see
each phrase in the context of an entire chapter, or the whole book, was awesome, helping
catch things that no one would otherwise catch. Steve spent most of his TE time on the
ICND2 book, but he did lend great help with this one, particularly with his reviews of the
security-oriented topics, an area in which he’s an expert. And more so than any other book
I’ve written, the TEs really sunk their teeth into the specifics of every example, helping
catch errors. Thanks so much!
Another (ho-hum) all-star performance from Chris Cleveland, who developed the book.
Now I empathize with sports writers who have to write about the local team’s star who bats
.300, hits 40 homers, and drives in 100 runs, every year, for his whole career. How many
ways can you say he does a great job? I’ll keep it simple: Thanks, Chris.
The wonderful and mostly hidden production folks did their usual great job. When every
time I see how they reworded something, and think, “Wow; why didn’t I write that?”, it
makes me appreciate the kind of team we have at Cisco Press. The final copy edit, figure
review, and pages review process required a fair amount of juggling and effort as well –
thanks to Patrick’s team, especially San Dee, Meg, Tonya, for working so well with all the
extra quality initiatives we’ve implemented. Thanks to you all!
Additionally, several folks who didn’t have any direct stake in the book also helped it along.
Thanks to Frank Knox for the discussions on the exams, why they’re so difficult, and about
troubleshooting. Thanks to Rus Healy for the help with wireless. Thanks to the Mikes at
Skyline for making my schedule work to get this book (and the ICND2 book) out the door.
And thanks to the course and exam teams at Cisco for the great early communications and
interactions about the changes to the courses and exams.
Finally, thanks to my wife Kris for all her support with my writing efforts, her prayers,
and her understanding when the deadline didn’t quite match with our vacation plans this
summer. And thanks to Jesus Christ—all this effort is just striving after the wind without
Him.
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Contents at a Glance
Foreword xxvi
Introduction xxvii
Part I Networking Fundamentals 3
Chapter 1 Introduction to Computer Networking Concepts 5
Chapter 2 The TCP/IP and OSI Networking Models 17
Chapter 3 Fundamentals of LANs 41
Chapter 4 Fundamentals of WANs 71
Chapter 5 Fundamentals of IP Addressing and Routing 93
Chapter 6 Fundamentals of TCP/IP Transport, Applications,
and Security 129
Part II LAN Switching 165
Chapter 7 Ethernet LAN Switching Concepts 167
Chapter 8 Operating Cisco LAN Switches 197
Chapter 9 Ethernet Switch Configuration 231
Chapter 10 Ethernet Switch Troubleshooting 267
Chapter 11 Wireless LANs 299
Part III IP Routing 329
Chapter 12 IP Addressing and Subnetting 331
Chapter 13 Operating Cisco Routers 399
Chapter 14 Routing Protocol Concepts and Configuration 435
Chapter 15 Troubleshooting IP Routing 471
Part IV Wide-Area Networks 509
Chapter 16 WAN Concepts 511
Chapter 17 WAN Configuration 539