a construction, operation and utilization guide Held, Gilbert creator Chichester Hoboken, NJ Wiley c2004 xvi, 290 p. : ill. ; 24 cm. Introduction to Virtual Private Networking (Page-1), Understanding Authentication and Encryption (Page-23), Understanding the TCP/IP Protocol Suite (Page-53), Layer 2 Operations (Page-79), Higher Layer VPNs (Page-133), VPN Hardware and Software (Page-203), Service Provider –Based VPNs (Page-261). Gilbert Held. Extranets (Computer networks) 650.028,HEL 0470854324 2004273037 http://www.loc.gov/catdir/bios/wiley047/2004273037.html http://www.loc.gov/catdir/description/wiley042/2004273037.html http://www.loc.gov/catdir/toc/wiley041/2004273037.html http://www.loc.gov/catdir/bios/wiley047/2004273037.html http://www.loc.gov/catdir/description/wiley042/2004273037.html http://www.loc.gov/catdir/toc/wiley041/2004273037.html 20230118130546.0