Which of the following can be used to create a VPN (Virtual Private Network)? A. PPP (Point-to-Point Protocol). B. PPTP (Point-to-Point Tunneling Protocol). C. SLIP (Serial Line Internet Protocol). D. ESLIP (Encrypted Serial Line Internet Protocol). Solution B. PPTP (Point-to-Point Tunneling Protocol). Tunneling refers creating a virtual dedicated connection between two systems or networks. You create the tunnel between the two ends by encapsulating the data in a mutually-agreed-upon protocol for transmission. In most tunnels, the data passed through the tunnel appears at the other side as part of the network. Point to point tunneling protocol was originally proposed by Microsoft and its associates and it works by embedding its very own network protocol within the TCP/IP packets. .