Copyright

Copyright Information

Copyright 1998 by Macmillan Technical Publishing

Cisco Press logo is a trademark of Cisco Systems, Inc.

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 2 3 4 5 6 7 8 9 0

Library of Congress Cataloging-in-Publication Number 98-84220

Warning and Disclaimer

This book is designed to provide information about TCP/IP . 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, Macmillan Technical Publishing, 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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Associate Publisher

Jim LeValley

Executive Editor

Julie Fairweather

Cisco Systems Program Manager

H. Kim Lew

Managing Editor

Caroline Roop

Acquisitions Editor

Tracy Hughes

Lynette Quinn

Development Editor

Kezia Endsley

Project Editor

Brad Herriman

Technical Editor(s)

Jennifer DeHaven Carroll

Mike Tibodeau

Team Coordinator

Amy Lewis

Book Designer

Trina Wurst

Cover Designer

Karen Ruggles

Production Team

Argosy

Indexer

Kevin Fulcher

Trademark Acknowledgments

All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Macmillan Technical Publishing 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.

Dedications

This book would not have been possible without the concerted efforts of many dedicated people. I would like to thank the following people for their contributions:

First, thanks to Laurie McGuire, development editor, who not only improved the book but improved me as a writer.

Thanks to Jenny DeHaven Carroll and Mike Tibodeau for their careful technical editing. I would also like to thank the following people, who provided technical advice or reviews on selected sections of the book: Howard Berkowitz, Dave Katz, Burjiz Pithawala, Mikel Ravizza, Russ White, and Man-Kit Yueng.

I would like to thank the following people at Macmillan Technical Publishing: Tracy Hughes and Lynette Quinn, who managed the project, and Julie Fairweather, the Executive Editor. In addition to being highly competent, they are three of the nicest people anyone could hope to work with. Also, thanks to Jim LeValley, Associate Publisher, who first approached me about writing this book.

Thanks to Wandel & Golterman, and to Gary Archuleta, W&G's Regional Sales Manager in Denver, for arranging the use of one of their excellent protocol analyzers for the length of the project.

Finally, I want to thank my wife, Sara, and my children: Anna, Carol, James, and Katherine. Their patience, encouragement, and support were critical to the completion of this book.