... authenticating server) and all VPN client computers. • PPTP can be used by computers running Windows XP, Windows 2000, Windows NT version 4.0, Windows Millennium Edition (ME), Windows 98, and Windows ... following are advantages of PPTP over L2TP/IPSec in Windows 2000: • PPTP does not require a certificate infrastructure. L2TP/IPSec requires a certificate infrastructure for issuing computer certificates ... remote access solution. Typically, corporations choose either an MIS department solution, where an internal information systems department is charged with buying, installing, and maintaining corporate...