Networking All-in-One Desk Reference for Dummies

867 Pages·2005·9.59 MB·English

by  Doug Lowe

01_599399_ffirs.qxd 8/18/05 11:48 PM Page i
Networking
ALL-IN-ONE DESK REFERENCE
FOR
DUMmIES
‰
2
ND EDITION
by Doug Lowe
01_599399_ffirs.qxd 8/18/05 11:48 PM Page iv
01_599399_ffirs.qxd 8/18/05 11:48 PM Page i
Networking
ALL-IN-ONE DESK REFERENCE
FOR
DUMmIES
‰
2
ND EDITION
by Doug Lowe
01_599399_ffirs.qxd 8/18/05 11:48 PM Page ii
Networking All-in-One Desk Reference For Dummies®, 2nd Edition
Published by
Wiley Publishing, Inc.
111 River Street
Hoboken, NJ 07030-5774
www.wiley.com
Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana
Published by Wiley Publishing, Inc., Indianapolis, Indiana
Published simultaneously in Canada
No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or
by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permit-
ted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written
permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the
Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, [phone], fax [phone].
Requests to the Publisher for permission should be addressed to the Legal Department, Wiley Publishing,
Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256, [phone], fax [phone], or online at
http://www.wiley.com/go/permissions.
Trademarks:Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for the
Rest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, and related trade
dress are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United
States and other countries, and may not be used without written permission. All other trademarks are the
property of their respective owners. Wiley Publishing, Inc., is not associated with any product or vendor
mentioned in this book.
LIMIT OF LIABILITY/DISCLAIMER OF WARRANTY: THE PUBLISHER AND THE AUTHOR MAKE NO REPRESENTATIONS
OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS WORK AND
SPECIFICALLY DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PAR-
TICULAR PURPOSE. NO WARRANTY MAY BE CREATED OR EXTENDED BY SALES OR PROMOTIONAL MATERIALS. THE
ADVICE AND STRATEGIES CONTAINED HEREIN MAY NOT BE SUITABLE FOR EVERY SITUATION. THIS WORK IS SOLD
WITH THE UNDERSTANDING THAT THE PUBLISHER IS NOT ENGAGED IN RENDERING LEGAL, ACCOUNTING, OR
OTHER PROFESSIONAL SERVICES. IF PROFESSIONAL ASSISTANCE IS REQUIRED, THE SERVICES OF A COMPETENT
PROFESSIONAL PERSON SHOULD BE SOUGHT. NEITHER THE PUBLISHER NOR THE AUTHOR SHALL BE LIABLE FOR
DAMAGES ARISING HEREFROM. THE FACT THAT AN ORGANIZATION OR WEBSITE IS REFERRED TO IN THIS WORK
AS A CITATION AND/OR A POTENTIAL SOURCE OF FURTHER INFORMATION DOES NOT MEAN THAT THE AUTHOR OR
THE PUBLISHER ENDORSES THE INFORMATION THE ORGANIZATION OR WEBSITE MAY PROVIDE OR RECOMMEN-
DATIONS IT MAY MAKE. FURTHER, READERS SHOULD BE AWARE THAT INTERNET WEBSITES LISTED IN THIS WORK
MAY HAVE CHANGED OR DISAPPEARED BETWEEN WHEN THIS WORK WAS WRITTEN AND WHEN IT IS READ.
For general information on our other products and services, please contact our Customer Care
Department within the U.S. at 800-762-2974, outside the U.S. at 317-572-3993, or fax [phone].
For technical support, please visit www.wiley.com/techsupport.
Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may
not be available in electronic books.
Library of Congress Control Number: 2005927615
ISBN-13: 978-0-7645-9939-2
ISBN-10: 0-7645-9939-9
Manufactured in the United States of America
10 9 8 7 6 5 4 3 2 1
2O/QX/QZ/QV/IN
01_599399_ffirs.qxd 8/18/05 11:48 PM Page iii
About the Author
Doug Lowehas written a whole bunch of computer books, including more
than 35 For Dummiesbooks, among them Networking For Dummies, 7th
Edition, Java All-in-One Desk Reference For Dummies, PowerPoint 2003 For
Dummies, and Word 2003 All-in-One Desk Reference For Dummies. He lives in
sunny Fresno, California, where the motto is “No, we aren’t really the Armpit
of California,” with his wife, the youngest of his three daughters, and a goofy-
looking six-month-old Shar-Pei/Black Lab mix named Lucy. He’s one of those
obsessive-compulsive decorating nuts who puts up tens of thousands of
lights at Christmas and creates computer-controlled Halloween decorations
that rival Disney’s Haunted Mansion. Last year he actually built a pirate ship
in his backyard.
01_599399_ffirs.qxd 8/18/05 11:48 PM Page iv
01_599399_ffirs.qxd 8/18/05 11:48 PM Page v
Dedication
To Debbie, Rebecca, Sarah, and Bethany.
Author’s Acknowledgments
I’d like to start by thanking everyone who was involved with the second edi-
tion of this book, especially project editor Christopher Morris, who heeded
the Hitchhiker’s Guidecreed (“Don’t panic!”) when I was occasionally late with
submissions and who did a great job following through on all the little edito-
rial details needed to put a book of this scope together on time. Thanks also
to Dan DiNicolo, who gave the manuscript a thorough review and offered
many excellent suggestions for improvements, and to copy editors Jean
Rogers and Andy Hollandbeck, who whipped my prose into shape, crossing
all the i’s and dotting all the t’s, or something like that. And, as always, thanks
to all the behind-the-scenes people who chipped in with help I’m not even
aware of.
01_599399_ffirs.qxd 8/18/05 11:48 PM Page vi
Publisher’s Acknowledgments
We’re proud of this book; please send us your comments through our online registration form
located at www.dummies.com/register/.
Some of the people who helped bring this book to market include the following:
Acquisitions, Editorial, and Composition Services
Media Development
Project Coordinator: Adrienne Martinez
Project Editor:Christopher Morris
Layout and Graphics: Andrea Dahl,
Acquisitions Editor:Melody Layne Lauren Goddard, Denny Hager,
Stephanie D. Jumper, Heather Ryan,
Copy Editors:Jean Rogers, Andy Hollandbeck
Mary Gillot Virgin
Technical Editor:Dan DiNicolo
Proofreaders: Leeann Harney, Jessica Kramer,
Editorial Manager:Kevin Kirschner Joe Niesen, Dwight Ramsey, Evelyn W. Still
Media Development Supervisor: Indexer: Infodex Indexing Services Inc.
Richard Graves
Editorial Assistant:Amanda Foxworth
Cartoons:Rich Tennant (www.the5thwave.com)
Publishing and Editorial for Technology Dummies
Richard Swadley,Vice President and Executive Group Publisher
Andy Cummings,Vice President and Publisher
Mary Bednarek,Executive Acquisitions Director
Mary C. Corder,Editorial Director
Publishing for Consumer Dummies
Diane Graves Steele,Vice President and Publisher
Joyce Pepple,Acquisitions Director
Composition Services
Gerry Fahey,Vice President of Production Services
Debbie Stailey,Director of Composition Services
02_599399_ftoc.qxd 8/18/05 11:49 PM Page vii
Contents at a Glance
Introduction ................................................................1
Book I: Networking Basics ...........................................7
Chapter 1: Understanding Networks ...............................................................................9
Chapter 2: Understanding Network Protocols and Standards ..................................19
Chapter 3: Understanding Network Hardware ............................................................41
Chapter 4: Understanding Network Operating Systems ............................................59
Book II: Building a Network .......................................75
Chapter 1: Planning a Network ......................................................................................77
Chapter 2: Installing Network Hardware ......................................................................95
Chapter 3: Setting Up a Network Server .....................................................................111
Chapter 4: Configuring Client Computers ..................................................................127
Chapter 5: Configuring Other Network Features .......................................................139
Chapter 6: Verifying Your Network Installation .........................................................151
Book III: Network Administration and Security ..........157
Chapter 1: Help Wanted: Job Description for a Network Administrator ................159
Chapter 2: Security 101 .................................................................................................173
Chapter 3: Managing User Accounts ...........................................................................183
Chapter 4: Firewalls and Virus Protection .................................................................191
Book IV: Network Troubleshooting
and Disaster Planning ..............................................203
Chapter 1: Solving Network Problems ........................................................................205
Chapter 2: Network Performance Anxiety .................................................................219
Chapter 3: Protecting Your Network ...........................................................................229
Chapter 4: Disaster Recovery and Business Continuity Planning ..........................239
Chapter 5: Dealing with Dysfunctional E-Mail ............................................................247
Book V: TCP/IP and the Internet ...............................255
Chapter 1: Introduction to TCP/IP and the Internet .................................................257
Chapter 2: Understanding IP Addresses .....................................................................265
Chapter 3: Using DHCP .................................................................................................283
Chapter 4: Using DNS ....................................................................................................297
Chapter 5: Using FTP .....................................................................................................321
Chapter 6: TCP/IP Tools and Commands ...................................................................343