Stallings, William. <br/><br/>
Network security essentials :  applications and standards / 
William Stallings. 
 - 4th ed. 
 - Boston, [Mass.] :  Pearson,  c2011. 
 - 431 p. :  ill. ;  24 cm. +  1 internet access card. 
<br/><br/> "International edition." -- Cover. 
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<br/><br/><label>ISBN: </label>9780137067923 0137067925 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures.
<br/><br/><label>Dewey Class. No.: </label>005.8