Black, Uyless D. <br/><br/>
Data communications and distributed networks / 
Uyless D. Black. 
 - 3rd ed. 
 - London :  Prentice-Hall International,  c1993. 
 - xvi, 426 p. :  ill., maps ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0130908533 (pbk.)  
<br/><br/><label>Subjects--Index Terms: </label>Computers  Network