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Dynamic Host Configuration Protocol (DHCP) provides a means of allocating and managing IP addresses dynamically over a network. Before the advent of DHCP, administrators configured each host on a network with an IP address, subnet mask, and default gateway. Maintaining the changes and the logs of the changes took a tremendous amount of time and was prone to error. DHCP uses a client/server model in which the network information is maintained and updated dynamically by the system. | DHCP for Windows 2000 by Neall Alcott Copyright 2001 O Reilly Associates Inc. All rights reserved. Printed in the United States of America. Published by O Reilly Associates Inc 101 Morris Street Sebastopol CA 95472. Editor Sue Miller Production Editor Leanne Clarke Soylemez Cover Designer EllieVolckhausen Printing History January 2001 First Edition. Nutshell Handbook the Nutshell Handbook logo and the O Reilly logo are registered trademarks of by O Reilly Associates Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book and O Reilly Associates Inc. was aware of a trademark claim the designations have been printed in caps or initial caps. The assocation between the image of a frilled coquette hummingbird and DHCP is a trademark of O Reilly Associates Inc. While every precaution have been taken in the preparation of this book the publisher assumes no responsibility for errors or omissions or for damages resulting from the use of the information contained herein. Library of Congress Cataloging-in-Publication Data can be found at http www.oreilly.com catalog dhcpwin2000 ISBN 1-56592-838-5 M Table of Contents Preface . 1 Conventions Used in This Book.1 How to Contact Us.2 Acknowledgments .2 1. TCP IP Overview.4 1.1 The TCP IP Protocol Suite.5 1.2 MAC Addresses.11 1.3 IP Addressing.14 1.4 DNS and Hostnames.21 1.5 WINS and NetBIOS Names.24 1.6 Summary.28 2. In The Beginning RARP and BOOTP.29 2.1 RARP.29 2.2 What Is BOOTP .30 2.3 BOOTP Packet Structure.31 2.4 The BOOTP Conversation.32 2.5 Summary.38 3. Making Life Easier DHCP.39 3.1 Why DHCP .39 3.2 DhCp Packet Structure.42 3.3 The DHCP Conversation.43 3.4 The DHCP Relay Agent.52 3.5 Summary.55 4. Designing a DHCP Infrastructure.56 4.1 Who Needs DHCP .56 4.2 Creating an IP Addressing Plan.57 4.3 Network Topology.64 4.4 DHCP Client Needs.65 4.5 Defining Scopes.66 4.6 Fault Tolerance.67 4.7 Putting It All Together .
