Held, Gilbert <br/><br/>
Understanding data communications 

 - 7th 
 - New Delhi  Pearson Education Publisher 
 - Soft Binding  xv        765 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-81-317-0872-9 
<br/><br/><label>Subjects--Topical Terms: </label>--Data transmission systems, Computer networks
<br/><br/><label>Dewey Class. No.: </label>004.6 HEL-U