'''Point-to-Point Tunneling Protocol''' ('''PPTP''') is a Virtual Private Network (VPN) protocol that uses a TCP control channel and a Generic Routing Encapsulation (GRE) tunnel to encapsulate PPP packets. | '''Point-to-Point Tunneling Protocol''' ('''PPTP''') is a Virtual Private Network (VPN) protocol that uses a TCP control channel and a Generic Routing Encapsulation (GRE) tunnel to encapsulate PPP packets. |