Business data communications :
Shelly, Gary B.
Business data communications : introductory concepts and techniques / Gary B. Shelly, Thomas J. Cashman, Judy A. Serwatka. - 4th ed. - Cambridge, Mass. ; London : Course Technology, c2004. - 1 v. (various pagings) : col. ill., col. maps ; 28 cm. - Shelly Cashman series. Introductory. .
Previous ed.: 2001.
Includes bibliographical references and index.
9780789668066
Data transmission systems.
HD30.335 / .S54 2004
Business data communications : introductory concepts and techniques / Gary B. Shelly, Thomas J. Cashman, Judy A. Serwatka. - 4th ed. - Cambridge, Mass. ; London : Course Technology, c2004. - 1 v. (various pagings) : col. ill., col. maps ; 28 cm. - Shelly Cashman series. Introductory. .
Previous ed.: 2001.
Includes bibliographical references and index.
9780789668066
Data transmission systems.
HD30.335 / .S54 2004