Understanding Data Communications, Seventh Edition is the modern bible of data communications. It covers how data communications systems and their various hardware and software components work. In addition to this, the concepts covered allow the reader to access their current forms of data communication to determine systems best suit their current needs. Covering a vast range of topics from data networking to data communication security, this book focuses on the present and future of data communications. New material from the previous edition includes wireless technologies and security. The author provides a basis for understanding data communications in general, and provides expertise on setting up and securing types of communications systems. Organized like it's highly successful 6th edition, this book can be tailored to the needs of both the computer professional and student. It approaches data communications in a tutorial format, challenging the reader with questions following every chapter to assess what has been learned. In addition to this, the author provides additional resources to the computer professional that wants a more in-depth account of specific concepts.