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Dear Reader,

Thank you for choosing CCENT 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.

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Acknowledgments

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

Monica Worthy Lammle was crucial to the finished product this book has become, going over every word of every chapter with me to fine tune the language, and grammar. Without Monica’s guidance and patience, I’d never have finished writing this book.

Next in line to thank was my new technical editor, John Swartz, who also co-authored the CCNA Data Center Study Guide with me. His expertise in the Cisco technical field, and his history of networking in general, is second to none. His detailed analysis of my work helped make this my best CCENT 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 Cisco world. Jeff, I look forward to our continued progress together in the Cisco certification world.

Christine O’Connor, my production editor, and Judy Flynn, my copy editor, are my rock and foundation for formatting and intense editing of every page in this book. This amazing team gives me the confidence to help me keep moving during the difficult and very long days, week after week. How Christine stays so organized with all my enormous amount of changes as well as making sure every figure is in the right place in the book is still a mystery to me! You’re amazing, Christine! Thank you! Judy understands my writing style so well now, after doing at least a dozen books with me, she can tell when I made a technical error that I may have missed when previously going through the material. Thank you, Judy, for doing such a great job! I truly thank you both.

Troy McMillian: Troy has become my de facto writer, technical editor, and researcher, and he always comes through on any unreasonable deadline. I always look forward to working with Troy.

Jim Frye is my admin and student liaison at GlobalNet Training, and he was instrumental in taking my figures that I created and making them a masterpiece. Thank you, Jim!

Finally, a big thanks to Craig Woods at Happenstance-Type-O-Rama, proofreaders Josh Chase and Sarah Kaikini, indexer Robert Swanson, and to the Sybex media-development team.

About the Author

Todd Lammle is the Authority on Cisco Certification and internetworking. He is a world-renowned author, speaker, trainer, and consultant. Todd has three decades of experience working with LANs, WANs, and large licensed and unlicensed wireless networks, and lately he has been implementing large Cisco data centers worldwide. His three decades of real world experience is prevalent in his writing; he is not just an author but an experienced networking engineer with very practical experience working on the largest networks in the world. Todd has published over 60 books, including the very popular CCNA: Cisco Certified Network Associate Study Guide, CCNA Wireless Study Guide, and CCNA Data Center Study Guide, all from Sybex. He runs an international training and consulting company based in Colorado, Texas, and San Francisco.

You can reach Todd through his forum and blog at www.lammle.com.