Contents at a Glance
Part I: Networking Fundamentals 3
Chapter 1 Introduction to Computer Networking 5
Chapter 2 The TCP/IP and OSI Networking Models 17
Chapter 3 Fundamentals of LANs 47
Chapter 4 Fundamentals of WANs 77
Chapter 5 Fundamentals of IPv4 Addressing and Routing 99
Chapter 6 Fundamentals of TCP/IP Transport, Applications, and Security 135
Part II: LAN Switching 171
Chapter 7 Ethernet LAN Switching Concepts 173
Chapter 8 Operating Cisco LAN Switches 203
Chapter 9 Ethernet Switch Configuration 237
Chapter 10 Ethernet Switch Troubleshooting 273
Chapter 11 Wireless LANs 305
Part III: IPv4 Addressing and Subnetting 335
Chapter 12 Perspectives on IPv4 Subnetting 337
Chapter 13 Analyzing Classful IPv4 Networks 367
Chapter 14 Converting Subnet Masks 383
Chapter 15 Analyzing Existing Subnet Masks 397
Chapter 16 Designing Subnet Masks 411
Chapter 17 Analyzing Existing Subnets 427
Chapter 18 Finding All Subnet IDs 459
Part IV: IPv4 Routing 479
Chapter 19 Operating Cisco Routers 481
Chapter 20 Routing Protocol Concepts and Configuration 517
Chapter 21 Troubleshooting IP Routing 553
Part V: Wide-Area Networks 591
Chapter 22 WAN Concepts 593
Chapter 23 WAN Configuration 621
Part VI: Final Preparation 645
Chapter 24 Final Preparation 647
Part VII: Appendixes 657
Appendix A Answers to the “Do I Know This Already?” Quizzes 659
Appendix B Numeric Reference Tables 681
Appendix C ICND1 Exam Updates: Version 1.0 689
Glossary 693
Index 718
Part VIII: DVD-Only
Appendix D Practice for Chapter 13: Analyzing Classful IPv4 Networks
Appendix E Practice for Chapter 14: Converting Subnet Masks
Appendix F Practice for Chapter 15: Analyzing Existing Subnet Masks
Appendix G Practice for Chapter 16: Designing Subnet Masks
Appendix H Practice for Chapter 17: Analyzing Existing Subnets
Appendix I Practice for Chapter 18: Finding All Subnet IDs
Appendix J Additional Scenarios
Appendix K Subnetting Video Reference
Appendix L Memory Tables
Appendix M Memory Tables Answer Key
Appendix N ICND1 Open-Ended Questions
Introduction
Congratulations! If you’re reading far enough to look at this book’s Introduction, then you’ve probably already decided to go for your Cisco certification. If you want to succeed as a technical person in the networking industry at all, you need to know Cisco. Cisco has a ridiculously high market share in the router and switch marketplace, with more than 80 percent market share in some markets. In many geographies and markets around the world, networking equals Cisco. If you want to be taken seriously as a network engineer, Cisco certification makes perfect sense.
Historically speaking, the first entry-level Cisco certification has been the Cisco Certified Network Associate (CCNA) certification, first offered in 1998. The first three versions of the CCNA certification required that you pass a single exam to become certified. However, over time, the exam kept growing, both in the amount of material covered, and the difficulty level of the questions. So, for the fourth major revision of the exams, announced in 2003, Cisco continued with a single certification (CCNA), but offered two options for the exams to get certified: a single exam option and a two-exam option. The two-exam option allowed people to study roughly half of the material, take and pass one exam, before they moved to the next one.