Easttom, Chuck. <br/><br/>
Network defense and countermeasures :  principles and practices / 

 - Upper Saddle River, N.J. :  Pearson Education, Inc.  c2006. 
 - xxiv, 424 pages :  Illustrations ; 
 - Security series, .
<br/><br/> Includes bibliographical references and index. 
<br/><br/>Introduction to network security -- Types of attacks -- Fundamentals of firewalls -- Firewall practical applications -- Intrusion detection systems -- Encryption -- Virtual private networks -- Operating system hardening -- Defending against virus attacks -- Defending against trojan horses and spyware -- Security policies -- Assessing a system -- Security standards -- Computer-based espionage and terrorism. 
<br/><br/><label>ISBN: </label>0131711261 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks - security measures.
<br/><br/><label>LC Class. No.: </label>TK 5105.59  / EAS