47240.book Page i Friday, July 7, 2006 1:41 PM Network Administrator Street Smarts A Real World Guide to CompTIA Network+® Skills Toby Skandier Wiley Publishing, Inc. 47240.book Page iii Friday, July 7, 2006 1:41 PM 47240.book Page i Friday, July 7, 2006 1:41 PM Network Administrator Street Smarts A Real World Guide to CompTIA Network+® Skills Toby Skandier Wiley Publishing, Inc. 47240ffirs.fm Page ii Tuesday, July 11, 2006 9:06 AM Acquisitions and Development Editor: Jeff Kellum Technical Editor: Kevin Lundy Production Editor: Sarah Groff-Palermo Copy Editor: Judy Flynn Production Manager: Tim Tate Vice President and Executive Group Publisher: Richard Swadley Vice President and Executive Publisher: Joseph B. Wikert Vice President and Publisher: Neil Edde Book Designers: Judy Fung, Bill Gibson Compositor: Chris Gillespie, Happenstance Type-O-Rama Proofreader: Ian Golder Indexer: Ted Laux Cover Designer: Ryan Sneed Copyright © 2006 by Wiley Publishing, Inc., Indianapolis, Indiana Published simultaneously in Canada ISBN-13: 9-780-470-04724-8 ISBN-10: 0-470-04724-0 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 permitted 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 Rose- wood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. 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TRADEMARKS: Wiley, the Wiley logo, and the Sybex logo 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 per- mission. Network+ is a registered trademark of Computer Technology Industry Association, Inc. All other trade- marks are the property of their respective owners. Wiley Publishing, Inc., is not associated with any product or vendor mentioned in this book. 10 9 8 7 6 5 4 3 2 1 47240.book Page iii Friday, July 7, 2006 1:41 PM For my loving and supportive wife, Karen. As the wife of an author, you make it without me and still manage to stand by me. 143 47240.book Page iv Friday, July 7, 2006 1:41 PM Acknowledgments Not that a simple acknowledgment is sufficient, but I want to recognize the father of the Street Smarts series, Jeff Kellum. Jeff came to me in the fall of 2005 with his idea. Less than a year later, multiple titles were in the works. I’m sincerely grateful that Jeff considered me for the networking installment in the series. Networking has always been my greatest passion in the computing world. Thanks, Jeff. I’m indebted to Kevin Lundy for keeping me honest in my discussions. A better technical editor I could not have asked for. I’m simply in awe of Sarah Groff-Palermo and Judy Flynn. Their mastery of the English language is a beautiful thing. Of course, all those who work long hours supporting an author and his book I cannot thank enough. My crude drawings come to life in exacting detail. My manuscript is typeset in a professional and alluring style. My work is bound and marketed to the masses. Your exper- tise is necessary, and I appreciate it more than you can know. My gratitude goes out to my Embarq Corporation management team, Rich Hake, Jackie Stecher, and Al Smith, as well as to my colleagues in the Talent Management organization. You constantly challenge me and provide me opportunities for growth. Finally, thank you to my incredible kids, Toby, Tiffani, Trey, and Taylor. You guys support and encourage your dad through your own hard work and determination. You make quite a family. 47240.book Page v Friday, July 7, 2006 1:41 PM About the Author Toby Skandier has been in the networking field since the early 1990s and general computing since the mid-1980s. He is a Technical Trainer for Embarq™ Corporation tasked with devel- oping and delivering technical courses for Embarq associates and affiliates. Toby is also the author of the Sybex titles Network+ Study Guide and CCNP: Complete Study Guide, as well as technical editor for many others. Toby holds the following industry and vendor certifica- tions: Network+, A+, i-Net+, Server+, CTT+, CCNP, CCIP, CCDP, and MCSE. 47240.book Page vi Friday, July 7, 2006 1:41 PM Contents at a Glance Introduction xiii Phase 1 Designing an Internetwork 1 Phase 2 Implementing and Configuring the Design 51 Phase 3 Maintaining and Securing the Network 137 Phase 4 Troubleshooting the Network 245 Index 323 47240.book Page vii Friday, July 7, 2006 1:41 PM Contents Introduction xiii Phase 1 Designing an Internetwork 1 Task 1.1: Drawing an Internetwork 2 Scenario 3 Scope of Task 3 Procedure 4 Criteria for Completion 7 Task 1.2: Identifying Network Components 9 Scenario 9 Scope of Task 9 Procedure 10 Criteria for Completion 10 Task 1.3: Differentiating Ethernet Devices 15 Scenario 15 Scope of Task 15 Procedure 16 Criteria for Completion 18 Task 1.4: Discovering and Filtering MAC Addresses 18 Scenario 18 Scope of Task 18 Procedure 19 Criteria for Completion 32 Task 1.5: Applying the OSI Model 32 Scenario 33 Scope of Task 33 Procedure 34 Criteria for Completion 35 Task 1.6: Developing an IP Addressing Scheme 35 Scenario 36 Scope of Task 36 Procedure 36 Criteria for Completion 43 Task 1.7: Designing a VLAN Scheme 43 Scenario 44 Scope of Task 44 Procedure 44 Criteria for Completion 49