Table of Contents


enhancing lan performance, fourth edition
Enhancing LAN Performance, Fourth Edition
byGilbert Held ISBN:0849319420
Auerbach Publications 2004 (480 pages)

This book explores the technical issues underlying local area network (LAN) performance, developing mathematical models that readers can apply to their own specific networking requirements.

Table of Contents
Enhancing LAN Performance, Fourth Edition
Chapter 1 - LAN Performance Issues
Chapter 2 - Ethernet, Token Ring, and ATM Frame and Cell Operations
Chapter 3 - Estimating Network Traffic
Chapter 4 - Understanding and Applying Waiting Line Analysis
Chapter 5 - Sizing Communications Equipment and Line Facilities
Chapter 6 - Using the Availability Level as a Decision Criterion
Chapter 7 - Estimating Ethernet Network Performance
Chapter 8 - Estimating Token Ring Network Performance
Chapter 9 - ATM Performance
Chapter 10 - Working with Images
Chapter 11 - Using Intelligent Switches
Chapter 12 - LAN Monitoring Tools
Chapter 13 - Transmission Optimization Techniques
Appendix A - Review Problems
List of Figures
List of Tables

Providing up-to-date information on practical methods that improve network efficiency, this book covers how to estimate network traffic, determine availability and reliability of different network configurations, and ascertain the number of ports required on access controllers. It also tackles the line speed of WAN connections linking routes and how to work with images and techniques used to optimize online traffic. The fourth edition covers the economics of Web-hosting and the impact of images on monthly server costs. The author discusses how to make cost-efficient decisions, how to develop models in order to predict LAN performance, and how to adjust LANs for improved performance.

Enhancing LAN Performance, Fourth Edition

Gilbert Held

A CRC Press Company

Library of Congress Cataloging-in-Publication Data

Held, Gilbert, 1943 “
Enhancing LAN performance / Gilbert Held. ”4th ed.
p. cm.
Includes bibliographical references and index.


(alk. paper)
1. Local area networks (Computer networks) ”Evaluation. I. Title.

TK5105.7.H4383 2004
004.6 ² 8 ”dc22 2003063686

This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information, but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use.

Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage or retrieval system, without prior permission in writing from the publisher.

The consent of CRC Press LLC does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific permission must be obtained in writing from CRC Press LLC for such copying.

Direct all inquiries to CRC Press LLC, 2000 N.W. Corporate Blvd., Boca Raton, Florida 33431.

Trademark Notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation, without intent to infringe.

Visit the Auerbach Publications Web site at

Copyright 2004 CRC Press LLC

Auerbach is an imprint of CRC Press LLC

No claim to original U.S. Government works
International Standard Book Number 0-8493-1942-0
Library of Congress Card Number 2003063686
1 2 3 4 5 6 7 8 9 0


In several books I have alluded to the fact that the development of a book is a team effort, and this book is certainly no exception.

As the author, I am directly responsible for the contents of this book. However, the many processes involved from its acquisition through its production require the skills and efforts of many individuals. Thus, I would be remiss if I did not take the time to acknowledge those individuals who certainly contributed to the development and production of this book.

As an old-fashioned writer, I like to work with pen and paper and use my notebook computer for those really labor- intensive operations, such as developing programs whose execution saves hours or days of hand-held calculator effort. In addition, the use of pen and paper provides me with the ability to easily modify drawings, which is especially convenient when encountering turbulence at 30,000 feet or when the notebook "battery low" warning light illuminates. While it is easy for me to use pen and paper to develop a manuscript, it truly takes a special talent to turn that draft manuscript into a professional manuscript complete with camera-ready illustrations. Once again, I am indebted to Linda Hayes for her fine effort in preparing the manuscript for submission.

Once a manuscript is submitted for production, a burden is removed from the author and placed upon the publisher. Thus, I would be remiss if I did not acknowledge the fine effort of CRC Press in bringing this new edition into print. Concerning CRC Press, my hat is once more tipped in acknowledgment to Rich O'Hanleyof Auerbach Publications for backing another book written by me.

Last, but certainly not least, the time spent writing a book places a considerable burden upon family life. Thus, my gratitude to my wife Beverly, whose cooperation and understanding during the many evenings and weekends I worked on this book are truly appreciated.

Gilbert Held
Macon, Georgia