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Any • Windows-compatible CD-ROM drive attempt to do so shall be void and of no effect. OF USE OF THE COLLECTION; LOSS OF DATA OR EQUIPMENT; Administrator’s Guide to TCP/IP, Second Edition Copyright Credits ©1995-2003 by CNET Networks, Inc. All rights reserved. Vice President, TechRepublic TechRepublic and its logo are trademarks of CNET Bob Artner Networks, Inc. All other product names or services identi- Assistant Vice President, TechRepublic fied throughout this book are trademarks or registered Kimberly Henderson trademarks of their respective companies. Reproduction of this publication in any form without prior written permis- Executive Editor, Premium Products sion is forbidden. Erik Eckel Managing Editor, Premium Products Disclaimer Janice Conard The information contained herein has been obtained from Content Resources Manager sources believed to be reliable. CNET Networks, Inc. dis- Marilyn Bryan claims all warranties as to the accuracy, completeness, or Graphic Artists adequacy of such information. CNET Networks, Inc. shall Natalie Strange have no liability for errors, omissions, or inadequacies in the Kimberly Wright information contained herein or for the interpretations Executive Editor, thereof. The reader assumes sole responsibility for the TechRepublic and Builder.com selection of these materials to achieve its intended results. Veronica Combs The opinions expressed herein are subject to change Senior Editors without notice. Paul Baldwin Beth Blakely CD-ROM License Toni Bowers TechRepublic grants you a limited, nonexclusive, nontrans- Bill Detwiler ferable license to use the CD-ROM on a single dedicated Jason Hiner computer. The use of the TechRepublic Resource CD is Judy Mottl governed by the license agreement that can be found in the John Sheesley printed documentation included with the CD-ROM. Read Jim Wells the agreement carefully before using the CD-ROM that Review Edit Manager accompanies this book. Rich Crossett Review Editors Contact Us Kachina Dunn TechRepublic Jody Gilbert 9900 Corporate Campus Drive Kim Mays Suite 1500 Amy Sellers Louisville, KY 40223 Copy Editors E-mail: [email protected] Selena Frye Tel.: 1.800.217.4339 Joyce Mathai www.techrepublic.com Suzanne Thornberry Janice Walter ISBN 1-931490-80-5 Linda Watkins B056 Editorial Intern Michelle Hamilton Membership Director Dan Scofield Promotions Manager Megan Hancock Foreword Administering TCP/IP networks may be the most stressful task that IT professionals undertake. Whether you’re designing, maintaining, or troubleshooting TCP/IP-powered networks, much is at stake. The slightest error or unplanned outage can bring an organization to a standstill. When TCP/IP networks fail, employees can’t access important network connections, including the Internet. Remote users are stopped in their tracks. E-mail fails. Files can’t be shared. In short, operations grind to a halt. Regardless of your organization’s size, you must ensure that its network is designed and subnet- ted properly, administered efficiently, and troubleshot quickly. TechRepublic has built a solution- packed book and CD tool kit to help you do just that. TechRepublic’s newly updated Administrator’s Guide to TCP/IP, Second Edition, and its accompany- ing CD-ROM tool kit, provides you with proven expertise, timesaving solutions, and helpful tips to build and keep enterprise TCP/IP networks running smoothly. Whether you have questions regard- ing TCP/IP fundamentals, DHCP, DNS, routing, cabling, or troubleshooting, you’ll find a wealth of solutions for all things TCP/IP. For example, TechRepublic’s Administrator’s Guide to TCP/IP, Second Edition will help you: X Master TCP/IP basics. X Subnet and supernet networks. X Implement efficient routing techniques. X Troubleshoot TCP/IP failures. X Configure NAT, WINS, DNS, DHCP, and other critical protocols. X Monitor and optimize your TCP/IP network. The TCP/IP CD-ROM tool kit included with the Administrator’s Guide to TCP/IP, Second Edition is packed with helpful tools to help ensure you have the checklists, forms, and scripts you need to diagnose and repair network failures quickly and efficiently. The CD-ROM also contains a special bonus chapter outlining critical Cisco solutions. Don’t attack network failures alone; turn to TechRepublic for expert, field-tested advice.