This is an article about a VPN protocol. For more information about available protocols, please refer to this article: https://support.nordvpn.com/hc/en-us/articles/206931809-Choosing-between-VPN-protocols
Point-to-Point Tunneling Protocol (PPTP) is a network protocol which enables the secure transfer of data from a remote client to a private company server by creating a virtual private network across IP/TCP-based data networks. PPTP supports multi-protocol, on-demand, virtual private networking over the public networks such as the Internet.
The networking technology of Point to Point Tunelling Protocol is an extension of the remote access PPP defined in the certification by the Internet Engineering Task Force (IETF) titled “The Point to Point Protocol for the Transmission of Multi Protocol Datagrams over PP Links,” referenced to as RFC (Request For Comments) 1171. The Point to Point Tunneling Protocol is a network protocol that encapsulates PPP packets into Internet Protocol datagrams for transmission over the Internet or other public IP/TCP-based networks. PPTP can also be used in private LAN to LAN networking.
The PPTP extension of PPP is clarified in the document titled “Point to Point Tunneling Protocol ,” PPTP – ppext – draft-ietf – 00. Text – pptp. A plan of this document was submitted to the IETF in June, 1996 by the firms of the PPTP Forum, which includes Ascend Communications, Microsoft Corporation, ECI Telematics, US Robotics and3Com/Primary Access.