"Computer Network Security: Theory and Practice" introduces to the reader a complete and concise view of network security. It provides in-depth theoretical coverage of recent advancements and practical solutions to network security threats. This book can be used for a one-semester network security course for graduate and upper-level undergraduate students, as well as a reference for IT professionals. Dr. Wang has been Professor of Computer Science at the University of Massachusetts Lowell since 2001, Director of its Center for Network and Information Security since 2004, and Chairman of its Department of Computer Science since 2007.