Ccna certification Practice Tests

Library of Congress Control Number: 2020932216

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I dedicate this book to my wife, Teresa, and my son, Joseph. I love you both.  

—JAB

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Acknowledgments

I would like to thank my wife, Teresa. She has had so much patience during the writing 

of this book. I would also like to thank the many people who made this book possible, 

including the following: Kenyon Brown at Wiley Publishing for giving me the opportu-

nity to write this book; Caroline Define, for working with me as the developmental editor 

and making the entire project seamless; Christine O’Connor, for helping with production 

editing and guiding me through the process; Todd Montgomery, for serving as technical 

reviewer to ensure I didn’t miss any details; and Judy Flynn, for her many edits that helped 

make this book a polished product. Thank you to the many other people I’ve never met 

who worked behind the scenes to make this book a success.

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About the Author