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PPTP is a network protocol that allows data transfer security from a remote client (the client that are far away from the server) to a private server company by creating a VPN through TCP/IP (Snader, 2005). This protocol developed by Microsoft and Cisco. PPTP is a network technology development of remote access Point-to-Point protocol issued by the Internet Engineering Task Force (IETF).

PPTP is a network protocol that change the IP datagram into PPP packets to be transmitted over the Internet. PPTP can also be used on a private network LAN-to-LAN. PPTP there since in the operating system Windows NT server and Windows NT Workstation version 4.0. Computers that run these operating systems can use the PPTP Protocol to safely connect with private network as a client with remote access via the internet. PPTP can also be used by a computer that is connected to the LAN to make VPN via LAN.

The main facilities of the use of PPTP is able to use public-switched telephone network (PSTN) to construct a VPN. The construction of the PPTP is easy and low-cost cheap to be a widely used solution for remote users and mobile users, because PPTP provides security and encryption of communication via PSTN or the internet.