TeAM
Digitally signed by TeAM YYePG
DN: cn=TeAM YYePG, c=US, o=TeAM
YYePG, ou=TeAM YYePG,
email=
YYePG Reason: I attest to the accuracy and
integrity of this document
Date: 2005.02.23 05:24:59 +08'00'
CCNA™:
Cisco® Certified
Network Associate
Study Guide,
5th Edition
Todd Lammle
SYBEX®
, CCNA™:
Cisco® Certified
Network Associate
Study Guide
5th Edition
Todd Lammle
San Francisco • London
,Publisher: Neil Edde
Acquisitions and Developmental Editor: Heather O’Connor
Production Editor: Elizabeth Campbell
Technical Editor: Toby Skandier
Copyeditor: Suzanne Goraj
Compositor: Craig James Woods, Happenstance Type-O-Rama
Graphic Illustrator: Jeff Wilson, Happenstance Type-O-Rama
CD Coordinator: Dan Mummert
CD Technician: Kevin Ly
Proofreaders: Jim Brook, Candace English, Nancy Riddiough
Indexer: Nancy Guenther
Book Designer: Judy Fung
Cover Designer: Archer Design
Cover Photographer: Photodisc, Victor Arre
Copyright © 2005 SYBEX Inc., 1151 Marina Village Parkway, Alameda, CA 94501. World rights reserved. No
part of this publication may be stored in a retrieval system, transmitted, or reproduced in any way, including but
not limited to photocopy, photograph, magnetic, or other record, without the prior agreement and written per-
mission of the publisher.
First edition copyright © 1999 SYBEX Inc.
Second edition copyright © 2000 SYBEX, Inc.
Third edition copyright © 2002 SYBEX, Inc.
Fourth edition copyright © 2003 SYBEX, Inc.
Library of Congress Card Number: 2004097259
ISBN: 0-7821-4391-1
SYBEX and the SYBEX logo are either registered trademarks or trademarks of SYBEX Inc. in the United States
and/or other countries.
Screen reproductions produced with FullShot 99. FullShot 99 © 1991-1999 Inbit Incorporated. All rights reserved.
FullShot is a trademark of Inbit Incorporated.
The CD interface was created using Macromedia Director, COPYRIGHT 1994, 1997-1999 Macromedia Inc. For
more information on Macromedia and Macromedia Director, visit http://www.macromedia.com.
This study guide and/or material is not sponsored by, endorsed by or affiliated with Cisco Systems, Inc. Cisco ®,
Cisco Systems ®, CCDA™, CCNA™, CCDP™, CSS1™, CCIP™, BSCI™, CCNP™, CCIE™, CCSI™, the Cisco
Systems logo and the CCIE logo are trademarks or registered trademarks of Cisco Systems, Inc. in the United
States and certain other countries. All other trademarks are trademarks of their respective owners.
TRADEMARKS: SYBEX has attempted throughout this book to distinguish proprietary trademarks from
descriptive terms by following the capitalization style used by the manufacturer.
The author and publisher have made their best efforts to prepare this book, and the content is based upon final
release software whenever possible. Portions of the manuscript may be based upon pre-release versions supplied
by software manufacturer(s). The author and the publisher make no representation or warranties of any kind
with regard to the completeness or accuracy of the contents herein and accept no liability of any kind including
but not limited to performance, merchantability, fitness for any particular purpose, or any losses or damages of
any kind caused or alleged to be caused directly or indirectly from this book.
Manufactured in the United States of America
10 9 8 7 6 5 4 3 2 1
, To Our Valued Readers:
Thank you for looking to Sybex for your CCNA exam prep needs. We at Sybex are proud
of our reputation for providing certification candidates with the practical knowledge and
skills needed to succeed in the highly competitive IT marketplace. This new edition of the
best-selling CCNA: Cisco Certified Network Associate Study Guide reflects our commit-
ment to provide CCNA candidates with the most up-to-date, accurate, and accessible
instructional material on the market.
As with previous editions, Todd and the editors have worked hard to ensure that the study
guide you hold in your hands is comprehensive, in-depth, and pedagogically sound. We’re
confident that this book will exceed the demanding standards of the certification marketplace
and help you, the CCNA certification candidate, succeed in your endeavors.
As always, your feedback is important to us. If you believe you’ve identified an error in the
book, please send a detailed e-mail to . And if you have general comments
or suggestions, feel free to drop me a line directly at . At Sybex we're con-
tinually striving to meet the needs of individuals preparing for certification exams.
Good luck in pursuit of your CCNA certification!
Neil Edde
Publisher—Certification
Sybex, Inc.
Digitally signed by TeAM YYePG
DN: cn=TeAM YYePG, c=US, o=TeAM
YYePG, ou=TeAM YYePG,
email=
YYePG Reason: I attest to the accuracy and
integrity of this document
Date: 2005.02.23 05:24:59 +08'00'
CCNA™:
Cisco® Certified
Network Associate
Study Guide,
5th Edition
Todd Lammle
SYBEX®
, CCNA™:
Cisco® Certified
Network Associate
Study Guide
5th Edition
Todd Lammle
San Francisco • London
,Publisher: Neil Edde
Acquisitions and Developmental Editor: Heather O’Connor
Production Editor: Elizabeth Campbell
Technical Editor: Toby Skandier
Copyeditor: Suzanne Goraj
Compositor: Craig James Woods, Happenstance Type-O-Rama
Graphic Illustrator: Jeff Wilson, Happenstance Type-O-Rama
CD Coordinator: Dan Mummert
CD Technician: Kevin Ly
Proofreaders: Jim Brook, Candace English, Nancy Riddiough
Indexer: Nancy Guenther
Book Designer: Judy Fung
Cover Designer: Archer Design
Cover Photographer: Photodisc, Victor Arre
Copyright © 2005 SYBEX Inc., 1151 Marina Village Parkway, Alameda, CA 94501. World rights reserved. No
part of this publication may be stored in a retrieval system, transmitted, or reproduced in any way, including but
not limited to photocopy, photograph, magnetic, or other record, without the prior agreement and written per-
mission of the publisher.
First edition copyright © 1999 SYBEX Inc.
Second edition copyright © 2000 SYBEX, Inc.
Third edition copyright © 2002 SYBEX, Inc.
Fourth edition copyright © 2003 SYBEX, Inc.
Library of Congress Card Number: 2004097259
ISBN: 0-7821-4391-1
SYBEX and the SYBEX logo are either registered trademarks or trademarks of SYBEX Inc. in the United States
and/or other countries.
Screen reproductions produced with FullShot 99. FullShot 99 © 1991-1999 Inbit Incorporated. All rights reserved.
FullShot is a trademark of Inbit Incorporated.
The CD interface was created using Macromedia Director, COPYRIGHT 1994, 1997-1999 Macromedia Inc. For
more information on Macromedia and Macromedia Director, visit http://www.macromedia.com.
This study guide and/or material is not sponsored by, endorsed by or affiliated with Cisco Systems, Inc. Cisco ®,
Cisco Systems ®, CCDA™, CCNA™, CCDP™, CSS1™, CCIP™, BSCI™, CCNP™, CCIE™, CCSI™, the Cisco
Systems logo and the CCIE logo are trademarks or registered trademarks of Cisco Systems, Inc. in the United
States and certain other countries. All other trademarks are trademarks of their respective owners.
TRADEMARKS: SYBEX has attempted throughout this book to distinguish proprietary trademarks from
descriptive terms by following the capitalization style used by the manufacturer.
The author and publisher have made their best efforts to prepare this book, and the content is based upon final
release software whenever possible. Portions of the manuscript may be based upon pre-release versions supplied
by software manufacturer(s). The author and the publisher make no representation or warranties of any kind
with regard to the completeness or accuracy of the contents herein and accept no liability of any kind including
but not limited to performance, merchantability, fitness for any particular purpose, or any losses or damages of
any kind caused or alleged to be caused directly or indirectly from this book.
Manufactured in the United States of America
10 9 8 7 6 5 4 3 2 1
, To Our Valued Readers:
Thank you for looking to Sybex for your CCNA exam prep needs. We at Sybex are proud
of our reputation for providing certification candidates with the practical knowledge and
skills needed to succeed in the highly competitive IT marketplace. This new edition of the
best-selling CCNA: Cisco Certified Network Associate Study Guide reflects our commit-
ment to provide CCNA candidates with the most up-to-date, accurate, and accessible
instructional material on the market.
As with previous editions, Todd and the editors have worked hard to ensure that the study
guide you hold in your hands is comprehensive, in-depth, and pedagogically sound. We’re
confident that this book will exceed the demanding standards of the certification marketplace
and help you, the CCNA certification candidate, succeed in your endeavors.
As always, your feedback is important to us. If you believe you’ve identified an error in the
book, please send a detailed e-mail to . And if you have general comments
or suggestions, feel free to drop me a line directly at . At Sybex we're con-
tinually striving to meet the needs of individuals preparing for certification exams.
Good luck in pursuit of your CCNA certification!
Neil Edde
Publisher—Certification
Sybex, Inc.
