Stewart, J. Michael <br/><br/>
Network security, firewalls, and VPNs / 
J. Michael Stewart and Denise Kinsey. 
 - 3rd ed. - 
 - Burlington, MA:  Jones & Bartlett Learning,  c2021. 
 - xxiii, 481 p. :  ill. ;  23 cm.  
 - (Information Systems Security & Assurance Series). .
<br/><br/>Includes appendices, bibliography, glossary and index. 
<br/><br/><label>ISBN: </label>978-1-284-18365-8 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Firewalls (Computer security).<br/>Computer networks --Security measures.