Mark A. Sportack has worked in the information technology industry for more than 20 years. Mark's experience includes everything from computer programming and systems analysis, to running a national ISP network and hosting centers, to managing the daily technical operations of small, medium, and large enterprises. During his career, Mark has had the privilege to lead large teams of technical personnel, set technical direction and long-range plans, and manage multimillion-dollar capital and expense budgets. Mark is chief information officer for Pitney Hardin, LLP.Mark has authored numerous books including IP Addressing Fundamentals and IP Routing Fundamentals for Cisco Press. He has also written High Performance Networking Unleashed, Networking Essentials Unleashed, and Windows NT Clustering Blueprints.Mark holds an undergraduate degree from Montclair State University and an M.B.A. degree from Lehigh University.