Sherman, Kenneth. <br/><br/>
Data communications :  a user's guide / 
Ken Sherman. 
 - 3rd ed. 
 - Englewood Cliffs, N.J. :  Prentice Hall,  c1990. 
 - xxv, 597 p. :  ill. (some col.) ;  24 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0131990926 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.<br/>Data transmission systems.