Carr, Houston H; Synder, Charles A <br/><br/>
Data communications and network security 

 -   Tata McGraw-Hill Publishing Co. Ltd., New Delhi  2007 
 - 526 
<br/><br/><label>ISBN: </label>3180 
<br/><br/><label>Dewey Class. No.: </label>004.65  / CAR-D