Microsoft (MS) Point-to-Point Tunneling Protocol (PPTP) is used to enable remote users to connect back to their corporate network in a secured manner across the public Internet. You can allocate a single IP address to a remote location to conserve your "public" IP addresses. Then, you can allow multiple users to establish PPTP connections simultaneously to the same or to different locations. PPTP was added in Cisco IOS. Software Release 12.1(4)T.
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