Tim Parker, Ph.D., has written more than 60 books, including the first edition of TCP/IP Unleashed, six editions of Linux Unleashed, and Linux System Administrators Survival Guide. Dr. Parker is the Technical Editor of SCO World magazine and a frequent contributor to UNIX Review, Windows NT Systems, High Performance Computing, and other magazines.
Mark A. Sportack, is an information technology architect for AT&T, where he has worked for the past 18 years. His current responsibilities include testing and evaluating emerging technologies, and developing architectures and technology bases for internal networks. Additionally, Mark has written, or contributed to, numerous books including High Performance Networking Unleashed, Windows NT Clustering Blueprints, Networking Essentials Unleashed, and IP Routing Fundamentals.