Basic Data Communications: A Comprehensive Overview, William J. Beyda

Data Communications: From Basics to Broadband, William J. Beyda

Data & Computer Communications (6th Edition), William Stallings

Data & Computer Communications: International Edition, William Stallings

Understanding Data Communications and Networks, William A. Shay

Data and Computer Communications, William Stallings

Data Communications, G. Murray

Data & Computer Communications (6th Edition), William Stallings