Weaver, Randy. Guide to network defense and countermeasures / Randy Weaver. - 2nd ed. - Massachusetts : Thomson Course Technology, c2007. - xix, 523 p. : black and white illustrations ; 23 cm. Includes glossary and index. ISBN: 1418836796 Subjects--Topical Terms: Computer networks--Security measures.Computer security. Dewey Class. No.: CIR 005.8 W363g 2007