Forouzan, Behrouz A. <br/><br/>
Business data communications / 

 - Boston  McGraw-Hill,  2003. 
 - xxiii, 407 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0072397020 0071121943 
<br/><br/><label>LC Class. No.: </label>HD30.37  / .F76 2003