To create a VPN in Windows NT 4.0, you would use the PPTP (Point-to-Point Tunneling Protocol) protocol, which has been made obsolete in modern Windows VPNs through the use of the L2TP (Layer 2 Tunneling Protocol) protocol and IPSec (Internet Protocol Security).
Option A) PPTP and L2TP - This option is correct. Windows NT 4.0 used PPTP as the VPN protocol, but modern Windows VPNs use L2TP and IPSec for enhanced security.
Option B) PPoE and SMTP - PPoE (Point-to-Point over Ethernet) and SMTP (Simple Mail Transfer Protocol) are not VPN protocols. They are used for different purposes.
Option C) SMTP and PPoE - Same as Option B, SMTP and PPoE are not VPN protocols.
Option D) L2TP and PPTP - This option is incorrect. While L2TP is used in modern Windows VPNs, it is not the protocol used in Windows NT 4.0.
The correct answer is A) PPTP and L2TP. This option is correct because PPTP was the VPN protocol used in Windows NT 4.0, but it has been replaced by L2TP and IPSec in modern Windows VPNs.