Whitman, Michael E. <br/><br/>
Guide to firewalls & VPNs / 
 Guide to firewalls and VPNs 
Michael E. Whitman, Herbert J. Mattord, Andrew Green 
 - 3rd ed. 
 - Boston, MA :  Course Technology, Cengage Learning,  c2012 
 - xxii, 346 p. :  ill. ;  23 cm. 
<br/><br/> Includes index  Previous edition titled: Guide to firewalls and network security : intrusion detection and VPNs 
<br/><br/><label>ISBN: </label>9781111135393 1111135398 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures<br/>Computer networks--Security measures--Problems, exercises, etc.<br/>Computer security--Problems, exercises, etc.<br/>Firewalls (Computer security)<br/>Firewalls (Computer security)--Problems, exercises, etc.<br/>Extranets (Computer networks)