New York McGraw-Hill c2000 xxi, 678 p. : ill. ; 24 cm. + 1 CD-ROM (4 3/4 in.) Marcus Includes index. Firewalls (Computer security) 005.8 0072127945 0071356398 http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=54605 http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=54605 DLC