Sharma, Rajesh Kumar <br/><br/>
Cisco security bible 

 - New Delhi  IDG Books India (P) Ltd.  2002 
 - xx,780p. 
<br/><br/>   
<br/><br/><label>ISBN: </label>81-265-0262-2 
<br/><br/><label>Subjects--Index Terms: </label>Computer science  Network security  Firewalls  AAA security  Intrusion detection  Security policies- multiple OSI layers  Networking