"This book covers the typical broadband communication network systems. The question of why broadband networks are important in modern-day telecommunications is also covered. As evident from the outline@ the book is divided into five parts. The book begins by providing the fundamental concepts of broadband communication systems. Part 1 discusses Internet-based networks-Internet@ intranets@ and extranets. Part 2 addresses networking technologies-X.25 and frame relay@ fiber channel@ synchronous optical network (SONET)@ virtual private network (VPN)@ integrated service digital network (ISDN)@ broadband ISDN (B-ISDN)@ and asynchronous transfer mode (ATM). Part 3 focuses on access networks-digital subscriber line (DSL)@ cable modem@ and passive optical networks. Part 4 deals with wireless networks-wireless data services@ personal communications service (PCS)@ and satellite communications. Part 5 covers network management and network security. The book concludes with networking testing@ fault tolerance@ and analysis. Author(s) Cajetan M. Akujuobi@ Matthew N. Sadiku"