Business data networks and telecommunications / Raymond R. Panko. Panko, Raymond R. Business enterprises Computer networks Study guides. Computer networks Management Study guides. Data transmission systems Study guides. HD30.37 .P36 2009 005.71 PAB Upper Saddle River, NJ : Pearson Education, c2009. c2009. 2009 Text xxxiii, 587 p. : http://www.loc.gov/catdir/toc/ecip0814/2008010861.html eng