Guide to firewalls and network security :  intrusion detection and VPNs / 
Michael E. Whitman ... [et al.] 
 - 2nd ed. 
 - Boston, Mass. :  Course Technology/Cengage Learning,  2009. 
 - xxiv, 496 p. :  ill. ;  23 cm. 
<br/><br/> Previous ed. published as Guide to firewalls and network security by Greg Holden. Boston, Mass.: Course Technology, 2004. 
<br/><br/><label>ISBN: </label>9781435420168 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Firewalls (Computer security)<br/>Computer networks--Security measures.<br/>Extranets (Computer networks)
<br/><br/><label>Dewey Class. No.: </label>005.8  / HOL 2009