Inside network perimeter security /  
Stephen Northcutt...[et al]    
 - 2nd.ed.    
 - Indianapolis,Indiana  Sams,   2005.    
 - xxxii; 734p. :  ill.;   23cm.    
<br/><br/>Includes index    
<br/><br/><label>ISBN: </label>0672327376    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures