About the Author

William R. Parkhurst, Ph.D., CCIE #2969, is a program manager with the CCIE group at Cisco Systems. Bill is responsible for the CCIE Communications and Services exams. Prior to joining the CCIE team, Bill was a Consulting Systems Engineer supporting Sprint. Bill first became associated with Cisco Systems while he was a Professor of Electrical and Computer Engineering at Wichita State University (WSU). In conjunction with Cisco Systems, WSU established the first CCIE Preparation Laboratory.