tailieunhanh - CCNA 640-607 Certification Guide

Professional certifications have been an important part of the computing industry for many years and will continue to become more important. Many reasons exist for these certifications, but the most popularly cited reason is that of credibility. All other considerations held equal, the certified employee/consultant/job candidate is considered more valuable than one who is not. | CCNA Exam 640-607 Certification Guide Wendell Odom CCIE 1624 Cisco Press 201 West 103rd Street Indianapolis IN 46290 USA ii CCNA Exam 640-607 Certification Guide Wendell Odom Copyright 2002 Lacidar Unlimited Inc. Cisco Press logo is a trademark of Cisco Systems Inc. Published by Cisco Press 201 West 103rd Street Indianapolis IN 46290 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 or 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 1 2 3 4 5 6 7 8 9 0 First Printing March 2002 Library of Congress Cataloging-in-Publication Number 2001098200 ISBN 1-58720-055-4 Warning and Disclaimer This book is designed to provide information about CCNA Exam 640-607. 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 authors 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. Trademark Acknowledgments All terms mentioned in this book that are known to be trademarks or service marks have been appropriately 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. 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 .