Todd Lammle - CCNA, (640-802): Cisco Certified Network Associate Study Guide

Table of Contents

Acquisitions Editor: Jeff Kellum

Development Editor: Kathi Duggan

Technical Editors: Dan Garfield and John Rouda

Production Editor: Christine OConnor

Copy Editor: Judy Flynn

Editorial Manager: Pete Gaughan

Production Manager: Tim Tate

Vice President and Executive Group Publisher: Richard Swadley

Vice President and Publisher: Neil Edde

Media Project Manager 1: Laura Moss-Hollister

Media Associate Producer: Shawn Patrick

Media Quality Assurance: Josh Frank

Book Designers: Judy Fung and Bill Gibson

Compositor: Craig Woods, Happenstance Type-O-Rama

Proofreader: Jen Larsen, Word One

Indexer: Robert Swanson

Project Coordinator, Cover: Katherine Crocker

Cover Designer: Ryan Sneed

Copyright 2011 by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

ISBN: 978-0-470-90107-76

No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions .

Limit of Liability/Disclaimer of Warranty: The publisher and the author make no representations or warranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties, including without limitation warranties of fitness for a particular purpose. No warranty may be created or extended by sales or promotional materials. The advice and strategies contained herein may not be suitable for every situation. This work is sold with the understanding that the publisher is not engaged in rendering legal, accounting, or other professional services. If professional assistance is required, the services of a competent professional person should be sought. Neither the publisher nor the author shall be liable for damages arising herefrom. The fact that an organization or Web site is referred to in this work as a citation and/or a potential source of further information does not mean that the author or the publisher endorses the information the organization or Web site may provide or recommendations it may make. Further, readers should be aware that Internet Web sites listed in this work may have changed or disappeared between when this work was written and when it is read.

For general information on our other products and services or to obtain technical support, please contact our Customer Care Department within the U.S. at (877) 762-2974, outside the U.S. at (317) 572-3993 or fax (317) 572-4002.

Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books.

Library of Congress Cataloging-in-Publication Data Lammle, Todd. CCNA : Cisco Certified Network Associate study guide / Todd Lammle. 7th ed. p. cm. ISBN 978-0-470-90107-6 (pbk.) 978-1-118-08804-3 (ebk.) 978-1-118-08805-0 (ebk.) 978-1-118-08806-7 (ebk.) 1. Electronic data processing personnelCertification. 2. Computer networksExaminationsStudy guides. I. Title. II. Title: Cisco certified network associate study guide. QA76.3.L348 2011 004.6dc22 2011004111

TRADEMARKS: Wiley, the Wiley logo, and the Sybex logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and other countries, and may not be used without written permission. CISA and Certified Information Systems Auditor are registered trademarks of ISACA. All other trademarks are the property of their respective owners. Wiley Publishing, Inc., is not associated with any product or vendor mentioned in this book.

10 9 8 7 6 5 4 3 2 1

Dear Reader,

Thank you for choosing CCNA: Cisco Certified Associate Study Guide, Seventh Edition. This book is part of a family of premium-quality Sybex books, all of which are written by outstanding authors who combine practical experience with a gift for teaching.

Sybex was founded in 1976. More than 30 years later, were still committed to producing consistently exceptional books. With each of our titles, were working hard to set a new standard for the industry. From the paper we print on, to the authors we work with, our goal is to bring you the best books available.

I hope you see all that reflected in these pages. Id be very interested to hear your comments and get your feedback on how were doing. Feel free to let me know what you think about this or any other Sybex book by sending me an email at . Customer feedback is critical to our efforts at Sybex.

Best regards,

Neil Edde

Vice President and Publisher

Sybex, an Imprint of Wiley

Acknowledgments

My development editor for this book was Kathi Duggan. She was very patient and kind, and easy to work with (as long as I was never late with my submissions!). Thank you, Kathi, for being fun to work with and for being a very hard worker (answering emails literally throughout the night) and making sure everything was done on time and with the very high-quality standard that my Sybex CCNA book has become known for. Im very happy that you were my new DE for this project, Kathiwe created a great book together!

Next in line to thank was my new technical editor, Dan Garfield. His expertise in the Cisco technical field, and history of networking in general, is second to none. His detailed analysis of my work helped make this my best CCNA book in the last 13 years. Thank you, Dan, for working hard under pressure, with tight deadlines, and for staying the course of delivering high-quality work in a short time frame.

Jeff Kellum is instrumental to my success in the Cisco world and is my acquisitions editor. Jeff, thanks for your guidance and continued patience. I look forward to our continued progress together in the Cisco certification world.

In addition, Christine OConnor was an excellent production editor, and she worked really hard to get the book done as quickly as possible, without missing the small mistakes that are so easy to overlook. I am always very happy when Christine is on my list of editors for a book project! Judy Flynn, my copy editor, was another return editor for my book who was patient and helpful, and I am happy she worked with me once again. I look forward to having Christine and Judy working with me on my next project.

Last, but in no way least, was Troy McMillian. Troy has become my defacto writer, technical editor, researcher, and he has always comes through on any unreasonable deadline. I always look forward to working with Troy.

Finally a big thanks to Craig Woods at Happenstance-Type-O-Rama and to the CD team.

About the Author

Todd Lammle CCSI, CCNA/CCNA Wireless/CCNP/CCSP/CCVP, MCSE, CEH/CHFI, FCC RF Licensed, is the authority on Cisco certification and internetworking. He is a world-renowned author, speaker, trainer, and consultant. Todd has over 29 years of experience working with LANs, WANs, and large licensed and unlicensed wireless networks and has published over 50 books, including the very popular Sybex CCNA: Cisco Certified Network Associate Study Guide and the Sybex CCNA Wireless Study Guide . He runs an international training and consulting company based in Colorado and Texas. You can reach Todd through his forum and blog at www.lammle.com .