This book intends to focus on network protocol and communication in the area of information and industrial control. Various research on sub-layer protocols including Data Link Layer (DLL), Application Layer (AL) and User Layer (UL) in instrumentation network and TCP/IP, Web based protocol for industrial and informatic network and control problems involving network communication, along with the design of corresponding system are presented explicitly. The main objective of this book is to provide information on some latest research on some mainstream network protocols used in industry, including fundamental concepts and principles, latest technological developments, and as the main part, theoretical and practical research results ever accomplished.