Stallings, William <br/><br/>
Data and computer communications 

 - 5 
 - New York  Addison-Wesley  1993 
 - 875p. 
<br/><br/><label>ISBN: </label>8120312406 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication network<br/>Computer networks--Data communications<br/>Data communications<br/>Network--Data communications