Duck, Michael. <br/><br/>
Data communications and computer networks :  for computer scientists and engineers / 

 - 2nd ed. 
 - Harlow, England ;  New York :  Pearson/Prentice Hall,  c2003. 
 - xx, 415 pages :  Illustrations ; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0130930474 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.<br/>OSI (computer network standard)<br/>Data transmission systems.
<br/><br/><label>LC Class. No.: </label>TK 5105.5  / DUC