Thomas, Tom <br/><br/>
Network Security First-Step 

 - 2nd ed. 
 - Indianapolis  Cisco Press  2012 
 - xxiv, 423p. 
<br/><br/><label>ISBN: </label>158720410X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--security measures
<br/><br/><label>LC Class. No.: </label>TK5105.59  / .T46 2012 c.1