Whitman, Michael E. <br/><br/>
Guide to firewalls and VPNs / 
Michael E. Whitman, Herbert J. Mattord, Andrew Green. 
 - 3rd ed. 
 - Boston, MA :  Course Technology, Cengage Learning,  2012. 
 - xxii, 346 p. :  ill. ;  23cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>1111135398 : PAP  $140.95 9781111135393 
<br/><br/><label>Source: </label> Cengage Learning, 10650 Toebben Dr, Independence, KY, USA, 41051 SAN 200-2213 
<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/>Extranets (Computer networks).
<br/><br/><label>LC Class. No.: </label>QA 
<br/><br/><label>Dewey Class. No.: </label>005.8