Serwatka, Judy A. <br/><br/>
Business data communications :   introductory concepts and techniques/ 
Judy A Serwatka, Thomas J Cashman, Gary B Shelly. 
 - 4th ed. 
 - London :   Course Technology,   2004. 
 - 1 volume (various pagings) :   color illustrations;  28 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.         <br/>Business enterprises--Communication systems. <br/>Business enterprises--Computer networks.
<br/><br/><label>LC Class. No.: </label>HD30.335  / SER 2004