White, Curt M. Data communications and computer networks : a business user's approach / Curt M. White. - 7th ed. - Boston, MA : Course Technology Cengage Learning, c2013. - xxi, 421 p. : ill. ; 29 cm. Includes index. ISBN: 9781133626466 (hbk.) 1133626467 (hbk.) 9781133627210 (instructor ed.) 1133627218 (instructor ed.) Subjects--Topical Terms: Computer networks.OSI (Computer network standard)Data transmission systems. Dewey Class. No.: 004.6 / WHI 2013