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CCNA Portable Command Guide
Second Edition Scott Empson

Cisco Press
800 East 96th Street Indianapolis, Indiana 46240 USA

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CCNA Portable Command Guide, Second Edition
Scott Empson 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 byany 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 First Printing July 2007 Library of Congress Cataloging-in-Publication Data Empson, Scott. Portable command reference / ScottEmpson. -- 2nd ed. p. cm. ISBN 978-1-58720-193-6 (pbk.) 1. Computer networks--Examinations--Study guides. 2. Internetworking (Telecommunication)--Examinations--Study guides. 3. Electronic data processing personnel--Certification. I. Title. TK5105.5.E4352 2007 004.6--dc22 2007023863 ISBN-13: 978-1-5872-0193-6 ISBN-10: 1-58720-193-3

Warning and Disclaimer
This book is designed to provide informationabout the Certified Cisco Networking Associate (CCNA) exam and the commands needed at this level of network administration. Every effort has been made to make this book as complete and as 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 anyperson 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.

Trademark Acknowledgments
All terms mentioned in this book that are known to be trademarks or service marks have beenappropriately capitalized. Cisco Press or Cisco Systems, Inc., cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark.

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Corporate and Government Sales
The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may includeelectronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U.S. Corporate and Government Sales 1-800-382-3419 corpsales@pearsontechgroup.com For sales outside the United States please contact: International Sales international@pearsoned.com

Feedback Information
At Cisco Press,our goal is to create in-depth technical books of the highest quality and value. Each book is crafted with care and precision, undergoing rigorous development that involves the unique expertise of members from the professional technical community. Readers’ feedback is a natural continuation of this process. If you have any comments regarding how we could improve the quality of this book, orotherwise alter it to better suit your needs, you can contact us through e-mail at feedback@ciscopress.com. Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Publisher Associate Publisher Cisco Representative Cisco Press Program Manager Executive Editor Managing Editor Senior Development Editor Project Editor Copy Editor Technical EditorsEditorial Assistant Cover Designer Composition Proofreader Paul Boger Dave Dusthimer Anthony Wolfenden Jeff Brady Mary Beth Ray Patrick Kanouse Christopher Cleveland Meg Shaw Keith Cline Robert Elling, Philip Vancil Vanessa Evans Louisa Adair ICC Macmillan Inc. Karen A. Gill

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About the Author
Scott Empson is the associate chair of the Bachelor of Applied Information Systems Technology degree...
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