David Coleman would like to thank his children, Brantley and Carolina, for their patience and
understanding of their father throughout the writing of the book. I love you kids very much.
David Westcott would like to thank his wife, Gina, for her patience, understanding, and
support and for the hours she spent reading and editing the book.
Writing the CWNA study guide has been a nine-month adventure that neither of us fully
grasped from the start. We would like to thank all of the following individuals for their support and contributions during the entire process.
We must first thank Acquisitions and Developmental Editor Jeff Kellum of Sybex Publishing for initially finding us and bringing us on to this project. Jeff is an extremely patient and
understanding editor who, despite our best efforts, needed to send us an occasional nasty e-mail
message. We would also like to thank Project Editor Martine Dardignac of Wiley. Martine
was an absolute pleasure to work with despite the fact that we drove her crazy. We would also
love to thank our copyeditor, Judy Flynn; our proofreader, Nancy Riddiough; the illustrators;
and our media development specialist, Shannon Walters.
We need to give a big shout out to our technical editor, Sam Coyle. Sam is a member of the
IEEE with many years of practical experience in wireless communications. His contributions to
the book were nothing short of invaluable. When Sam is not providing awesome technical editing, he is vice president of business development for KanderstegNetrepid (www.netrepid.com),
a wireless solutions provider.
We would also like to thank Devin Akin, Kevin Sandlin, Scott Turner, and Scott Williams
of the CWNP Program (www.cwnp.com). You gentlemen should be proud of the internationally renowned wireless certification program that you have developed. It has been a pleasure
working with all of you the past four years.
Thanks to Proxim and to Ken Ruppel (kenruppel@gmail.com) for allowing us to include
the video “Beam Patterns and Polarization of Directional Antennas” on the CD-ROM, and
thanks to Andrew Potter for making himself available for our photography needs.
Special thanks goes to Andras Szilagyi, not only for creating the EMANIM software program, but also for all the extra assistance he provided by working with us to create a customized version of the program for the CD-ROM.
We would also like to think the following individuals and companies for their contributions
to the book:
• Air Defense—Nico Darrow, Ralf Deltrap, and Bryan Harkins (www.airdefense.net)
• Air Magnet—Jonathan Bass and Chia Chee Kuan (www.airmagnet.com)
• AirWave (www.airwave.com)
• Andrew Potter Photography—Andrew Potter (www.andrewpotterphotography.com)
• Aruba Networks—Christopher Leach (www.arubanetworks.com)
• Cognio—William Flanagan and Margo Schlossberg (www.cognio.com)
• Cushcraft—Mark Miller (www.cushcraft.com)
• D-Link—(www.dlink.com)
• Ekahau—Jussi Kiviniemi (www.ekahau.com)
• Fortress Technologies—Andrea Shirley and Joe Tomasone (www.fortresstech.com)