This connectivity should be provided by a variety of different networks and protocols that ensure that the cellular network to function efficiently, routing and handoff for mobile phone users. HAC proposes a comprehensive design for mobile communications including mobile agent, network access, protocols, applications, ubiquitous connectivity, routing, and handoff. Describes the latest advances in mobile telecommunications, and management protocols include hot topics such as mobile agents, network access, wireless application protocol, wireless LAN, architecture, routing and handoff Introducing and architecture analysis and design issues in mobile communications and networking include the question / problem / answers after each chapter is written as a practical, easily accessible tutorial with many figures and examples of existing protocols and architectures so that reading is important for engineers, system engineers, researchers, managers, senior & graduate students.