Stallings, William. Network security essentials : (E-Book) applications and standards / William Stallings - 4. ed. - Boston : Prentice Hall, cop. 2011 - xiv, 417 s. : ill. ; 24 cm. ISBN: 0136108059 (alk. paper) 9780136108054 (alk. paper) Subjects--Topical Terms: Computer networks--Security measures.Computer security. Subjects--Geographic Terms: E-Book Dewey Class. No.: 005.8