Cisco CCNA Study Guide

Dan’s Free CCNA Study Guide is a collection of tutorials designed to help students preparing for Cisco’s CCNA exam. These tutorials are not a braindump, a series of cram sheets, or anything of the sort. Quite to the contrary, they are a series of articles designed to help students learn many of the core concepts that they will need to be familiar with both for the exam and in their real-life interactions with Cisco switches and routers.

Will reading through every tutorial in this guide guarantee you a passing score on the CCNA exam(s)? Of course not. The tutorials in this guide are meant to help you learn and understand. If they help you to pass the exam, that’s great. You should note, however, that this guide is not updated to reflect every change that Cisco makes to its exams in terms of topics and depth of knowledge required. Things like that can, do, and almost certainly will change.

The links below will help you to navigate through the chapters and individual tutorials that make up this study guide.

Reader Hint: Because tutorials appear in reverse chronological order in the main body of the chapter index pages, use the “All Chapter XX Tutorials” list in the right-hand sidebar as your navigation guide. Additionally, you’ll find a link at the bottom of every individual article that will bring you to the next (or previous) article in that particular chapter. When you’re all done reading, test your knowledge with our free CCNA Practice Exams.

Chapter 1: Understanding Network Models

Chapter 2: Networking Fundamentals

Chapter 3: Layer 2 Switching

Chapter 4: Network Protocols

Chapter 5: IP Addressing and Subnetting

Chapter 6: Cisco Router Externals

Chapter 7: IOS Commands and Configuration

Chapter 8: Understanding and Configuring Routing

Chapter 9: Cisco IOS Access Lists

Chapter 10: Router Troubleshooting

Chapter 11: Wide Area Network (WAN) Technologies

Chapter 12: Network Address Translation

Author: Dan DiNicolo

Dan DiNicolo is a freelance author, consultant, trainer, and the managing editor of He is the author of the CCNA Study Guide found on this site, as well as many books including the PC Magazine titles Windows XP Security Solutions and Windows Vista Security Solutions. Click here to contact Dan.