First and foremost, we thank our editor, Mike Loukides, for his guidance and patience as we completed the book. Working with you is always a pleasure. We thank our technical review team, Olaf Gellert, Michael A. Johnson, Nico Kadel, Klaus Möller, Sandra O'Brien, Colin Phipps, Marco Thorbrügge, and Kevin Timm, for their insightful comments that improved the text. We also thank Paul Shelman, Beth Reagan, John Kling, Jill Gaffney, Patrick Romain, Rick van Rein, Wouter Hanegraaff, Harvey Newstrom, and "Scott" the sysadmin.

Dan would like to thank his family, Lisa and Sophie, for their support and love during the writing of this book. Richard would like to thank H. David Todd and Douglas Bigelow for giving him the chance that led to his career, lo these many years ago. Bob would like to thank his wife, Alison, for her support and understanding during too many nights and weekends when he was glued to his keyboard.

    Chapter 9. Testing and Monitoring