Todd Lammle - CCNA Routing and Switching Deluxe Study Guide: Exams 100-101, 200-101, and 200-120

Senior Acquisitions Editor: Jeff Kellum

Development Editor: Pete Gaughan

Technical Editors: John Swartz and Dax Mickelson

Production Editor: Christine OConnor

Copy Editor: Judy Flynn

Editorial Manager: Pete Gaughan

Production Manager: Tim Tate

Vice President and Executive Group Publisher: Richard Swadley

Associate Publisher: Chris Webb

Media Project Manager I: Laura Moss-Hollister

Media Associate Producer: Marilyn Hummel

Media Quality Assurance: Doug Kuhn

Book Designers: Judy Flynn and Bill Gibson

Compositor: Craig Woods, Happenstance Type-O-Rama

Proofreader: Josh Chase, Word One New York

Indexer: Robert Swanson

Project Coordinator, Cover: Katherine Crocker

Cover Designer: Ryan Sneed

Copyright 2014 by John Wiley & Sons, Inc., Indianapolis, Indiana

Published by John Wiley & Sons, Inc. Indianapolis, Indiana

Published simultaneously in Canada

ISBN: 978-1-118-78970-4

ISBN: 978-1-118-78973-5 (ebk.)

ISBN: 978-1-118-88112-5 (ebk.)

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 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions .

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 particular 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 Web site 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 Web site may provide or recommendations it may make. Further, readers should be aware that Internet Web sites 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 or to obtain technical support, please contact our Customer Care Department within the U.S. at (877) 762-2974, outside the U.S. at (317) 572-3993 or fax (317) 572-4002.

Wiley publishes in a variety of print and electronic formats and by print-on-demand. Some material included with standard print versions of this book may not be included in e-books or in print-on-demand. If this book refers to media such as a CD or DVD that is not included in the version you purchased, you may download this material at http://booksupport.wiley.com . For more information about Wiley products, Visit www.wiley.com .

Library of Congress Control Number: 2013948024

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 permission. CCNA is a registered trademark of Cisco Technology, Inc. All other trademarks are the property of their respective owners. John Wiley & Sons, Inc. is not associated with any product or vendor mentioned in this book.

10 9 8 7 6 5 4 3 2 1

Dear Reader,

Thank you for choosing CCNA Routing and Switching Deluxe Study Guide. This book is part of a family of premium-quality Sybex books, all of which are written by outstanding authors who combine practical experience with a gift for teaching.

Sybex was founded in 1976. More than 30 years later, were still committed to producing consistently exceptional books. With each of our titles, were working hard to set a new standard for the industry. From the paper we print on, to the authors we work with, our goal is to bring you the best books available.

I hope you see all that reflected in these pages. Id be very interested to hear your comments and get your feedback on how were doing. Feel free to let me know what you think about this or any other Sybex book by sending me an email at contactus@wiley.com . If you think youve found a technical error in this book, please visit http://sybex.custhelp.com . Customer feedback is critical to our efforts at Sybex.

Best regards,

Chris Webb

Associate Publisher, Sybex

There are many people that work to put a book together, and as an author, I dedicated an enormous amount of time to write this book, but it would have never been published without the dedicated, hard work of many other people.

Monica Worthy Lammle was crucial to the finished product this book became, going over every word of every chapter with me to fine-tune the language and grammar. Without Monicas support in all areas of my life, Id never have finished writing this book.

Next in line to thank is my new technical editor, John Swartz, who also co-authored the CCNA Data Center study guides with me. His expertise in the Cisco technical field and his deep understanding of networking in general is second to none. His detailed analysis of my work helped make this my best CCNA study guide ever. Thank you, John, for working hard under pressure, with tight deadlines, and for staying the course of delivering high-quality work in a short time frame.

Jeff Kellum, my acquisitions editor, is instrumental to my success in the world of Cisco certification. Jeff, I look forward to our continued progress together.

Christine OConnor, my production editor, and Judy Flynn, my copyeditor, were my rock and foundation for formatting and intense editing of every page in this book. This amazing team gives me the confidence to help keep me moving during the difficult and very long days, week after week. How Christine stays so organized with all my changes as well as making sure every figure is in the right place in the book is still a mystery to me! Youre amazing, Christine! Thank you! Judy understands my writing style so well now, after doing at least a dozen books with me, that she even sometimes finds a technical error that may have slipped through as I was going through the material. Thank you Judy for doing such a great job! I truly thank you both.

Troy McMillian really helped me on this book (on all books actually!) by working on the review and bonus questions, flash cards, as well as a third technical edit on the last stage of editing. He did a high-quality job in a short time! Thanks, Troy! Jim Frey, and Paul Sutton also really helped me put together this books amazing figures, and all-around second-look technical edit. Thank you both!