Ktawetz, N.  . <br/><br/>
Introduction to network security /  
by N. Krawetz. 
 - Boston :   Charles River Media ,   1997 
 - 583p ;  
<br/><br/><label>ISBN: </label>81-315-0248-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science
<br/><br/><label>Dewey Class. No.: </label>BV  / P7