Stallings, William. <br/><br/>
Network and internetwork security :  principles and practice / 
William Stallings. 
 - Englewood Cliffs, N.J. :  Prentice Hall,  c1995. 
 - xiii, 462 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references: p. 449-456. 
<br/><br/><label>ISBN: </label>0131800507 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures.<br/>Computer security.