ptg17246291 In addition to the wealth of updated content, this new edition includes a series of free hands-on exercises to help you master several real-world configuration and troubleshooting activities. These exercises can be performed on the CCENT/CCNA ICND1 100-105 Network Simulator Lite software included for free on the DVD or companion web page that accompanies this book. This software, which simulates the experience of working on actual Cisco routers and switches, contains the following 24 free lab exercises, covering all the topics in Part II, the first hands-on configuration section of the book: 1. Configuring Hostnames 2. Configuring Local Usernames 3. Configuring Switch IP Settings 4. Interface Settings I 5. Interface Settings II Save 6. Interface Settings III 7. Interface Status I 50% 8. Interface Status II 9. Interface Status III 10. Interface Status IV 11. Setting Switch Passwords on New 12. Switch CLI Configuration Process I CCENT&CCNA 13. Switch CLI Configuration Process II Simulators 14. Switch CLI Exec Mode 15. Switch Forwarding I See CD sleeve for 16. Switch IP Address offer details 17. Switch IP Connectivity I 18. Switch Security I ptg17246291 19. Switch Security II 20. Switch Security III 21. Switch Security IV 22. Switch Security Configuration Scenario 23. Switch Interfaces and Forwarding Configuration Scenario 24. Port Security Troubleshooting Scenario If you are interested in exploring more hands-on labs and practicing configuration and troubleshooting with more router and switch commands, see the special 50% discount offer in the coupon code included in the sleeve in the back of this book. Windows system requirements (minimum): n Windows 10 (32/64 bit), Windows 8.1 (32/64 bit), or Windows 7 (32/64 bit) n 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor n 1 GB RAM (32-bit) or 2 GB RAM (64-bit) n 16 GB available hard disk space (32-bit) or 20 GB (64-bit) n DirectX 9 graphics device with WDDM 1.0 or higher driver n Adobe Acrobat Reader version 8 and above Mac system requirements (minimum) n OS X 10.11, 10.10, 10.9, or 10.8 n Intel core Duo 1.83 GHz n 512 MB RAM (1 GB recommended) n 1.5 GB hard disk space n 32-bit color depth at 1024x768 resolution n Adobe Acrobat Reader version 8 and above CCENT/ CCNA ICND1 100-105 Official Cert Guide WENDELL ODOM, CCIE No. 1624 ptg17246291 Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA ii CCENT/CCNA ICND1 100-105 Official Cert Guide CCENT/CCNA ICND1 100-105 Official Cert Guide Wendell Odom Copyright© 2016 Cisco Systems, Inc. Published by: Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief quotations in a review. Printed in the United States of America First Printing May 2016 Library of Congress Control Number: 2016933699 ISBN-13: 978-1-58720-580-4 ISBN-10: 1-58720-580-7 Warning and Disclaimer This book is designed to provide information about the Cisco ICND1 100-105 exam for CCENT certification. Every effort has been made to make this book as complete and as accurate as possible, ptg17246291 but no warranty or fitness is implied. The information is provided on an “as is” basis. The authors, Cisco Press, and Cisco Systems, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or dam- ages arising from the information contained in this book or from the use of the discs or programs that may accompany it. The opinions expressed in this book belong to the author and are not necessarily those of Cisco Systems, Inc. Trademark Acknowledgments All terms mentioned in this book that are known to be trademarks or service marks have been appro- priately capitalized. Cisco Press or Cisco Systems, Inc., cannot attest to the accuracy of this informa- tion. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark. Special Sales For information about buying this title in bulk quantities, or for special sales opportunities (which may include electronic versions; custom cover designs; and content particular to your business, train- ing goals, marketing focus, or branding interests), please contact our corporate sales department at [email protected] or (800) 382-3419. For government sales inquiries, please contact [email protected]. For questions about sales outside the U.S., please contact [email protected]. iii Feedback Information At Cisco Press, our goal is to create in-depth technical books of the highest quality and value. Each book is crafted with care and precision, undergoing rigorous development that involves the unique expertise of members from the professional technical community. Readers’ feedback is a natural continuation of this process. If you have any comments regarding how we could improve the quality of this book, or otherwise alter it to better suit your needs, you can contact us through email at [email protected]. Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Publisher Paul Boger Associate Publisher Dave Dusthimer Business Operation Jan Cornelssen Manager, Cisco Press Executive Editor Brett Bartow Managing Editor Sandra Schroeder Senior Development Christopher Cleveland Editor Senior Project Editor Tonya Simpson ptg17246291 Copy Editors Keith Cline, Chuck Hutchinson Technical Editors Aubrey Adams, Elan Beer Editorial Assistant Vanessa Evans Cover Designer Mark Shirar Composition Studio Galou Senior Indexer Erika Millen Proofreaders Kathy Ruiz, Paula Lowell iv CCENT/CCNA ICND1 100-105 Official Cert Guide About the Author Wendell Odom, CCIE No. 1624 (Emeritus), has been in the networking industry since 1981. He has worked as a network engineer, consultant, systems engineer, instructor, and course developer; he currently works writing and creating certification study tools. This book is his 27th edition of some product for Pearson, and he is the author of all editions of the CCNA R&S and CCENT Cert Guides from Cisco Press. He has written books about topics from networking basics, certification guides throughout the years for CCENT, CCNA R&S, CCNA DC, CCNP ROUTE, CCNP QoS, and CCIE R&S. He helped develop the popular Pearson Network Simulator. He maintains study tools, links to his blogs, and other resources at www.certskills.com. About the Technical Reviewers Aubrey Adams is a Cisco Networking Academy instructor in Perth, Western Australia. With a background in telecommunications design, Aubrey has qualifications in elec- tronic engineering and management; graduate diplomas in computing and education; and associated industry certifications. He has taught across a broad range of both relat- ed vocational and education training areas and university courses. Since 2007, Aubrey has technically reviewed several Pearson Education and Cisco Press publications, including video, simulation, and online products. Elan Beer, CCIE No. 1837, is a senior consultant and Cisco instructor specializing in data center architecture and multiprotocol network design. For the past 27 years, Elan has designed networks and trained thousands of industry experts in data center archi- ptg17246291 tecture, routing, and switching. Elan has been instrumental in large-scale professional service efforts designing and troubleshooting internetworks, performing data center and network audits, and assisting clients with their short- and long-term design objec- tives. Elan has a global perspective of network architectures via his international clien- tele. Elan has used his expertise to design and troubleshoot data centers and internet- works in Malaysia, North America, Europe, Australia, Africa, China, and the Middle East. Most recently, Elan has been focused on data center design, configuration, and troubleshooting as well as service provider technologies. In 1993, Elan was among the first to obtain the Cisco Certified System Instructor (CCSI) certification, and in 1996, he was among the first to attain the Cisco System highest technical certification, the Cisco Certified Internetworking Expert. Since then, Elan has been involved in numer- ous large-scale data center and telecommunications networking projects worldwide. v Dedications For Hannah Grace Odom, my wonderful daughter: Tomato softball, equiangular equilateral quadrilaterals, being Jesus’s hands and feet, wasabi, smart brain and a bigger heart, movies while other kids are at school, Underdog stories, math homework—hooray!, singing scat. Love you, precious girl. ptg17246291 vi CCENT/CCNA ICND1 100-105 Official Cert Guide Acknowledgments Brett Bartow again served as executive editor on the book. We’ve worked together on probably 20+ titles now. Besides the usual wisdom and good decision making to guide the project, he was the driving force behind adding all the new apps to the DVD/web. As always, a pleasure to work with, and an important part of deciding what the entire Official Cert Guide series direction should be. As part of writing these books, we work in concert with Cisco. A special thanks goes out to various people on the Cisco team who work with Pearson to create Cisco Press books. In particular, Greg Cote, Joe Stralo, and Phil Vancil were a great help while we worked on these titles. Chris Cleveland did the development editing for the very first Cisco Press exam certi- fication guide way back in 1998, and he’s been involved with the series ever since. It’s always great to work with Chris, even though I’m jealous of his office setup. This book has more moving parts than most, and Chris’s part of the work happened on a challeng- ing timeline. Thanks, Chris, for the many late-night hours working through the different elements, and especially for keeping us on track with the new features. As for technical editors, ho hum, Elan Beer did his usual amazing job. It is truly abnormal to find one person who can do all aspects of technical editing in the same pass, with excellence. From finding small technical errors, to noticing phrasing that might mis- lead, to suggesting where an extra thought or two rounds out a topic, Elan does it all. Fantastic job as usual; thanks, Elan. ptg17246291 Aubrey Adams tech edited the book, his first time tech editing one of my books, and he also provided some excellent feedback. Aubrey’s experience teaching the material was a big help in particular, because he knows of the common mistakes that students make when learning these same topics. Diligent, objective, useful comments all around; thanks, Aubrey! Welcome and thanks to a new team member, Lisa Matthews, new at least in terms of someone I interact with during the writing process. Lisa handled all the practice app development: taking various appendixes, learning some subnetting (fun, huh Lisa?), and building apps to make the practice experience more interactive. Thanks for guiding us through the process, Lisa! I love the magic wand that is production. Presto, word docs with gobs of queries and comments feed into the machine, and out pops these beautiful books. Thanks to Sandra Schroeder, Tonya Simpson, Mandie Frank, for jumping into the fray to keep the sched- ule moving, and all the production team for making the magic happen. From fixing all my grammar, crummy word choices, passive-voice sentences, and then pulling the design and layout together, they do it all; thanks for putting it all together and making it look easy. And Tonya, once again getting the “opportunity” to manage two books with many elements at the same timeline, once again, the juggling act continues, and done well. Thanks for managing the whole production process again. Mike Tanamachi, illustrator and mind reader, did a great job on the figures again. I use a different process with the figures than most authors, with Mike drawing new figures as soon as I outline a new section or chapter. It means more edits when I change my mind, vii and lots of mind reading of what Wendell really wanted versus what I drew poorly on my Wacom tablet. Mike came through again with some beautiful finished products. And a thanks goes out to Laura Robbins for working on helping make sure all the figures follow our color standards—standards she helped develop over several other editions of other books. I could not have made the timeline for this book without Chris Burns of Certskills Professional. Chris owns the mind map process now, owns big parts of the lab develop- ment process for the associated labs added to my blogs, does various tasks related to specific chapters, and then catches anything I need to toss over my shoulder so I can focus on the books. Chris, you are the man! Sean Wilkins played the largest role he’s played so far with one of my books. A long- time co-collaborator with Pearson’s CCNA Simulator, Sean did a lot of technology work behind the scenes. No way the books are out on time without Sean’s efforts; thanks for the great job, Sean! A special thanks you to you readers who write in with suggestions and possible errors, and especially those of you who post online at the Cisco Learning Network. Without question, the comments I receive directly and overhear by participating at CLN made this edition a better book. Thanks to my wonderful wife, Kris, who helps make this sometimes challenging work lifestyle a breeze. I love walking this journey with you, doll. Thanks to my daughter Hannah (see dedication). And thanks to Jesus Christ, Lord of everything in my life. ptg17246291 viii CCENT/CCNA ICND1 100-105 Official Cert Guide Contents at a Glance Introduction xxxiv Your Study Plan 2 Part I: Networking Fundamentals 13 Chapter 1 Introduction to TCP/IP Networking 14 Chapter 2 Fundamentals of Ethernet LANs 38 Chapter 3 Fundamentals of WANs 60 Chapter 4 Fundamentals of IPv4 Addressing and Routing 78 Chapter 5 Fundamentals of TCP/IP Transport and Applications 102 Part I Review 120 Part II: Implementing Basic Ethernet LANs 125 Chapter 6 Using the Command-Line Interface 126 Chapter 7 Analyzing Ethernet LAN Switching 146 ptg17246291 Chapter 8 Configuring Basic Switch Management 166 Chapter 9 Configuring Switch Interfaces 190 Part II Review 212 Part III: Ethernet LANs: Design, VLANs, and Troubleshooting 217 Chapter 10 Analyzing Ethernet LAN Designs 218 Chapter 11 Implementing Ethernet Virtual LANs 242 Chapter 12 Troubleshooting Ethernet LANs 270 Part III Review 298 Part IV: IP Version 4 Addressing and Subnetting 301 Chapter 13 Perspectives on IPv4 Subnetting 302 Chapter 14 Analyzing Classful IPv4 Networks 326 Chapter 15 Analyzing Subnet Masks 340 Chapter 16 Analyzing Existing Subnets 356 Part IV Review 378