Forouzan, Behrouz A. <br/><br/>
Data communications and networking / 
By Behrouz A Forouzan. 
 - 3rd ed. 
 - New Delhi :  Tata McGraw Hill Publishing Company Ltd ,  2006. 
 - xxxiv,973p. ;  PB  23 cm. 
<br/><br/><label>ISBN: </label>0070584087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical layer<br/>Digital transmission<br/>Circuit switching and telephone network
<br/><br/><label>Dewey Class. No.: </label>004.65   / FORB