Analysis of information sources in references of the Wikipedia article "Layer 2 Tunneling Protocol" in English language version.
Point-to-Point Tunneling Protocol (PPTP) [:] A data-link layer protocol for wide area networks (WANs) based on the Point-to-Point Protocol (PPP) and developed by Microsoft that enables network traffic to be encapsulated and routed over an unsecured public network such as the Internet.[permanent dead link ]