Richard Froom would like to thank his coauthors for such great work, especially Troy in his authoring of the wireless chapters. Furthermore, Richard would like to thank all the Cisco Press employees who helped make this book happen.

Balaji Sirasubramanian would like to thank coauthors Richard, Erum, and Troy for all their hard work toward this project. He would also like to thank his former manager Scott Lawrence, for allowing him to work on the second edition of this book project. In conclusion, Balaji would also like to personally thank all the technical reviewers and Chris Cleveland for their excellent review and assistance in this project.

Erum Frahim and Troy Houston would like to thank Rich Froom, Mary Beth Ray, Chris Cleveland, Don Johnston, and John Tiso for their dutiful efforts and reviews.