Cisco Press 201 W 103rd Street Indianapolis, IN 46290 CCDA Exam Certification Guide A. Anthony Bruno, CCIE #2738 Jacqueline Kim, CCDA CH01.book Page i Friday, January 7, 2000 5:35 PM ii CCDA Exam Certification Guide A. Anthony Bruno Jacqueline Kim Copyright© 2000 Cisco Press Cisco Press logo is a trademark of Cisco Systems, Inc. Published by: Cisco Press 201 West 103rd Street Indianapolis, IN 46290 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 per- mission from the publisher, except for the inclusion of brief quotations in a review. Printed in the United States of America 1 2 3 4 5 6 7 8 9 0 Library of Congress Cataloging-in-Publication Number: 99-64086 ISBN: 0-7357-0074-5 Warning and Disclaimer This book is designed to provide information about the CCDA examination. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information is provided on an “as is” basis. The author, Cisco Press, and Cisco Systems, Inc., shall have neither lia- bility nor responsibility to any person or entity with respect to any loss or damages arising from the information con- tained 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 authors 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 appropriately capitalized. Cisco Press or Cisco Systems, Inc., cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark. CH01.book Page ii Friday, January 7, 2000 5:35 PM 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 e-mail at ciscopress@mcp.com . Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Publisher J. Carter Shanklin Executive Editor John Kane Cisco Systems Program Manager Jim LeValley Managing Editor Patrick Kanouse Development Editor Andrew Cupp Project Editor Dayna Isley Copy Editors Raymond Alexander Krista Hansing Technical Editors David Barnes Kevin Mahler Brian Melzer CD-ROM Exam Author David Barnes Media Developer Craig Atkins Team Coordinator Amy Lewis Cover Designer Louisa Klucznik Production Team Argosy Indexer Kevin Fulcher Copyright © 1999 Cisco Systems, Inc. All rights reserved. Printed in the USA. 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All other trademarks mentioned in this document are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any of its resellers. (9908R) Cisco Systems has more than 200 offices in the following countries. Addresses, phone numbers, and fax numbers are listed on the Cisco Connection Online Web site at http://www.cisco.com/offices. Argentina • Australia • Austria • Belgium • Brazil • Canada • Chile • China • Colombia • Costa Rica • Croatia • Czech Republic • Denmark • Dubai, UAE Finland • France • Germany • Greece • Hong Kong • Hungary • India • Indonesia • Ireland • Israel • Italy • Japan • Korea • Luxembourg • Malaysia • Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines • Poland • Portugal • Puerto Rico • Romania • Russia • Saudi Arabia • Singapore • Slovakia • Slovenia • South Africa • Spain • Sweden • Switzerland • Taiwan • Thailand • Turkey • Ukraine • United Kingdom • United States • Venezuela Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 European Headquarters Cisco Systems Europe s.a.r.l. Parc Evolic, Batiment L1/L2 16 Avenue du Quebec Villebon, BP 706 91961 Courtaboeuf Cedex France http://www-europe.cisco.com Tel: 33 1 69 18 61 00 Fax: 33 1 69 28 83 26 American Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-7660 Fax: 408 527-0883 Asia Headquarters Nihon Cisco Systems K.K. Fuji Building, 9th Floor 3-2-3 Marunouchi Chiyoda-ku, Tokyo 100 Japan http://www.cisco.com Tel: 81 3 5219 6250 Fax: 81 3 5219 6001 CH01.book Page iii Friday, January 7, 2000 5:35 PM iv About the Authors A. Anthony Bruno is a Senior Network Systems Consultant with Lucent’s NetCare Professional Services Division (formerly International Network Services). His network certifications include CCIE #2738, CCDP, CCNA-WAN, Microsoft MCSE, Nortel NNCSS, Certified Network Expert (CNX) Ethernet, Certified Network Professional, and Check Point CCSE. As a consultant, he has worked with many customers in the design, implementation, and optimiza- tion of large-scale networks. Anthony has worked on the design of large company network mergers, Voice over IP/ Frame Relay, and Internet access. He formerly worked as an Air Force captain in network operations and management. He completed his Master of Science degree in Electrical Engineering from University of Missouri-Rolla in 1994 and his Bachelor of Science degree in Electrical Engineering from University of Puerto Rico-Mayaguez in 1990. Anthony is a contributor and the lead technical reviewer for the Cisco Press release CCIE Fundamentals: Network Design and Case Studies , Second Edition. Jacqueline Kim is the Knowledge Resource Manager with REALTECH Systems Corporation. She designed the Knowledge Exchanged Group that has the objective of providing technical instruction to clients through instructor-led classes and Web-based training tools. She staffs and manages this group within Knowledge Management and also teaches several classes. Jacqueline has various industry certifications, including Cisco CCDA, Novell CNE, and Check Point CCSA/CCSE. She has held positions in both network engineering and pre-sales engineering, during which time she presented lectures in security for Cisco Systems and Network User Groups. Jacqueline is a technical reviewer for the Cisco Press titles Internetworking Technologies Handbook , Second Edition, and Cisco Systems Networking Acad- emy: First-Year Companion Guide . About the Technical Reviewers David Barnes is a Network Consulting Engineer for Cisco Systems in Dallas, Texas. He is a Cisco Certified Design Professional, MCSE+Internet, and Master CNE. David specializes in large-scale network design and optimization. He has designed, implemented, and managed networks for numerous Fortune 500 companies during the past 10 years. Kevin S. Mahler , CCNP and CCDA, is the National Wide-Area Network and Network Operations Center manager for the American Cancer Society. Kevin's teams are responsible for designing, deploying, maintaining, and monitoring the networks of the American Cancer Society. He also runs his own Web hosting company where he is trying to find his fortune on the Internet. He is the author of CCNA Training Guide published by New Riders. He also worked as a revi- sion author on the third edition of Internetworking Technologies Handbook from Cisco Press. Kevin ran his own com- pany designing, selling, and installing computer and networking systems for over ten years. Kevin has worked as a programmer, repair technician, networking consultant, database administrator, and Internetworking engineer. Today, he reminisces of when CP/M was king, everyone wanted WordStar, Microsoft was a small company, portable computers weighed just under 45 pounds, and 10 Mbps was a fast network. You can find him on the Internet at www.kmahler.com or e- mail him at kmahler@kmahler.com. Brian Melzer is a network engineer for AT&T Solutions, where he has worked for the past three years. He is part of the Wolfpack, having earned a bachelor degree in Electrical Engineering and a master’s degree in management from North Carolina State University in Raleigh, North Carolina. He is a Cisco Certified Internetworking Expert (#3981). Having managed some of the largest networks in the world, Brian has extensive experience working with Cisco routers and switches. CH01.book Page iv Friday, January 7, 2000 5:35 PM v Dedications This book is dedicated to my loving wife, Ivonne, my inspiration and support; and to our daughters, Joanne Nichole and Dianne Christine, my joy.—Anthony This book is dedicated to my wonderful parents, whose love and wisdom are my guiding light; and to my lovely sister, Jeanette, whose strength I so admire.—Jacqueline CH01.book Page v Friday, January 7, 2000 5:35 PM vi Acknowledgments This book would not have been possible without the efforts of many dedicated people. Anthony Bruno would like to thank the following people for their contributions: First, thanks to Andrew Cupp, Development Editor, who not only improved the book but also improved me as a writer. I would like to thank Cisco Press Executive Editor John Kane for his vision and guidance of this book. Thanks to the technical editors, David Barnes, Kevin Mahler, and Brian Melzer, whose advice and careful attention to detail improved the book. Thanks to Dayna Isley, Project Editor, and Raymond Alexander and Krista Hansing, Copy Editors, for their efforts. Thanks also to Amy Lewis, Team Coordinator, for taking care of many details. Jacqueline Kim would like to thank the following people for their contributions: I would like to thank John Kane, Executive Editor at Cisco Press, for his continued guidance through this endeavor, and whose undying support made this project a reality. To Andrew Cupp, Development Editor, thanks for the encourage- ment. To everyone at REALTECH Systems Corporation, my second family, thank you all for sharing your knowledge and visions of the future with me. Special thanks to the founders of REALTECH, Ray LaChance and Ken Yanneck, whose foresight and entrepreneurial spirits inspire me; to my gifted friend Robert Caputo for his mentoring and support; to my friends Cuong Vu, Damon Yuhasz, Yoeng-Sen Liem, Andrew Bernardo, Cheuk Lee, and Phillip Gwon, who generously shared their technical expertise and their time; to Tom Wurst, for his wisdom; to Nancy Sanchez, for her coaching; to Mark Agovino, for his support; and to Kevin Chin, without whom I couldn’t have made it through the year. Finally, to all my coworkers and friends I could not acknowledge by name, thank you for all your support during this challenging project. CH01.book Page vi Friday, January 7, 2000 5:35 PM vii Contents at a Glance Introduction xix Chapter 1 Design Goals 2 Chapter 2 Assessing the Existing Network and Identifying Customer Objectives 28 Chapter 3 Application Considerations 64 Chapter 4 Network Topologies and LAN Design 98 Chapter 5 WAN Design 154 Chapter 6 Designing for Specific Protocols 196 Chapter 7 The Design Document and Cisco Network Management Applications 246 Chapter 8 Building a Prototype or Pilot 282 Chapter 9 Additional Case Studies 312 Appendix A Answers to Quiz Questions 334 Appendix B Glossary 360 Appendix C Internetworking Technology Review 510 Appendix D LAN Media Reference 540 Appendix E Cisco Small and Medium Business Solution Guide 556 Index 636 CH01.book Page vii Friday, January 7, 2000 5:35 PM viii Contents Introduction xix Chapter 1 Design Goals 2 “Do I Know This Already?” Quiz 3 Foundation Topics 6 Customer Objectives 6 Business Requirements of the Customer 6 Technical Requirements of the Customer 6 Business and Political Constraints 8 Framework for Small- to Medium-Sized Network Design 8 Steps for Network Design 9 Gather Information to Support the Business and Technical Requirements 10 Assess the Current Network 10 Consider the Applications Involved 13 Design the Local-Area Network 14 Design the Wide-Area Network 16 Design for Specific Network Protocols 17 Create the Design Document and Select Cisco Network Management Applications 18 Test the Design 19 Q&A 20 Case Studies 22 Case Study #1: GHY Resources 22 Case Study #2: Pages Magazine, Inc. 23 Case Study #3: MediBill Services, Inc. 25 Additional Case Studies 27 Chapter 2 Assessing the Existing Network and Identifying Customer Objectives 28 “Do I Know This Already?” Quiz 29 Foundation Topics 32 The Necessary Data for Characterizing the Existing Network 32 Assessing the Customer’s Corporate Profile Information 32 Assessing the Customer’s Technical Information 33 Documenting the Existing Network 35 CH01.book Page viii Friday, January 7, 2000 5:35 PM ix Twelve Steps for Documenting Your Customer’s Existing Network 36 Step 1: Characterize the Customer’s Application 37 Step 2: Characterize the Network Protocols 37 Step 3: Document the Customer’s Current Network 38 Step 4: Identify Potential Bottlenecks 40 Step 5: Identify the Business Constraints and Inputs into Your Network Design 41 Step 6: Characterize the Existing Network Availability 42 Step 7: Characterize the Network Performance 43 Step 8: Characterize the Existing Network Reliability 43 Step 9: Characterize the Network Utilization 44 Step 10: Characterize the Status of the Major Routers 45 Step 11: Characterize the Existing Network Management Tools 45 Step 12: Summarize the Health of the Existing Network 46 Extracting the New Customer Requirements 47 Characterizing Network Traffic 48 Broadcast and Multicast Behavior 49 Frame Size 50 Windowing and Flow Control 50 Error Recovery 51 Characterizing Traffic Loads and Behaviors 52 Q&A 58 Case Study 60 Case Study #2: Pages Magazine, Inc. 60 Case Study Answers 62 Chapter 3 Application Considerations 64 “Do I Know This Already?” Quiz 65 Foundation Topics 68 IBM Networking 68 Source-Route Bridging 68 Advanced Peer-to-Peer Networking 72 Data-Link Switching Plus 72 Microsoft Windows Networking 74 NT Protocols 74 Dynamic Host Configuration Protocol 75 Windows Internet Naming System 76 CH01.book Page ix Friday, January 7, 2000 5:35 PM x Multimedia Networking 77 Packet Voice 77 Video Streams 79 Novell Application Services 80 AppleTalk Services 81 Firewall Services 82 Mail Application Flow 84 Future Application Plan 85 Foundation Summary 87 Q&A 89 Case Studies 92 Case Study #1: GHY Resources 92 Case Study #2: Pages Magazine, Inc. 93 Case Study Answers 94 Case Study #1: GHY Resources 94 Case Study #2: Pages Magazine, Inc. 96 Chapter 4 Network Topologies and LAN Design 98 “Do I Know This Already?” Quiz 99 Foundation Topics 102 LAN Topology Design 102 Hierarchical Models 102 Redundant Models 108 Secure Models 115 LAN Types 119 Large Building LANs 120 Campus LANs 121 Small/Remote Site LANs 121 LAN Media 122 Ethernet Design Rules 122 10 Mbps Fiber Ethernet Design Rules 123 100 Mbps Fast Ethernet Design Rules 124 Token Ring Design Rules 130 Gigabit Ethernet Design Rules 131 FDDI Design Rules 131 CH01.book Page x Friday, January 7, 2000 5:35 PM [...]... topics covered on the CCDA exam If that objective is reached, passing the CCDA exam should follow easily The CCDA exam will be a stepping stone for most people as they progress through the other Cisco certifications; passing the exam because of a thorough understanding and recall of the topics will be incredibly valuable at the next steps This book prepares you to pass the CCDA exam by doing the following:... practice that will make you more comfortable when you actually take the CCDA exam The CCDA Exam Objectives Cisco lists the objectives for CCDA Exam on its Web site at http://www.cisco.com/warp/public/10/wwtraining/certprog/ testing/pdf /ccda. pdf This list provides the most key information about what the test covers Table I-1 lists these CCDA exam objectives and the corresponding chapters in this book that... to obtain CCDA certification is called Designing Cisco Networks (DCN) Exam #640-441 This is a computerbased test that currently consists of between 80 and 90 questions and has a 120-minute time limit All exam registrations are made by calling Sylvan Prometric at 1-800-204-3926 The cost for the exam is $100 USD Throughout this book, you will see the exam referred to as the DCN exam or the CCDA exam; they... electronic version of the book The CD-ROM also enables you to take a timed practice CCDA exam that is very similar in format to the actual CCDA exam you will be taking The practice exam is complete with both general knowledge and case study questions and draws on your knowledge of all the published CCDA exam objectives The practice exam has a database of more than 200 questions, so you can test yourself more... selfpaced training material before you take the CCDA exam For more information on the various levels of certification, career tracks, and Cisco exams, go to the Cisco Learning Connection page of the Cisco Connection Online (CCO) Web site at http://www.cisco.com/certifications About This Book CCDA Exam Certification Guide is intended to help you prepare for the CCDA exam, recognize and improve your areas of... by the CCDA exam Before you begin studying for any exam, it is important that you know the topics that could be covered With the CCDA exam, knowing what is on the exam is seemingly straightforward; Cisco publishes a list of CCDA objectives However, the objectives are certainly open to interpretation Chapters 1 through 8 directly follow Cisco’s CCDA exam objectives and provide detailed information on... Mastered All the Exam Objectives? The exam tests you on a wide variety of topics; most people will not remember all the topics on the exam Because some study is required, this book focuses on helping you obtain the maximum benefit from the time you spend preparing for the exam You can access many other sources for the information covered on the exam; for example, you could read the Cisco Documentation... prepare for the exam You should begin your exam preparation by spending ample time reviewing the exam objectives listed in the section “The CCDA Exam Objectives,” later in this introduction Check out Cisco’s Web site for any future changes to the list of objectives How This Book Is Organized The book begins with a chapter that generally defines the topics that will be covered by the CCDA exam Before you... designed to provide you with mastery of the CCDA objectives Because the scope of this book focuses on helping you master the CCDA exam objectives, the authors assume that readers have a certain level of internetworking knowledge It is strongly recommended that you take the DCN course or acquire an equivalent amount of on-the-job training before solidifying your CCDA knowledge with the elements of this... exam; they are the same exam for the purposes of this text The DCN exam measures your ability to design networks that meet certain requirements for performance, security, capacity, and scalability The exam is focused on small- to medium-sized networks The candidate should have at least one year of experience in the design of small- to medium-sized networks using Cisco products A CCDA candidate should . IN 46290 CCDA Exam Certification Guide A. Anthony Bruno, CCIE #2738 Jacqueline Kim, CCDA CH01.book Page i Friday, January 7, 2000 5:35 PM ii CCDA Exam Certification. cost for the exam is $100 USD. Throughout this book, you will see the exam referred to as the DCN exam or the CCDA exam; they are the same exam for the