PPTP (Point-to-Point Tunneling Protocol)

A tunneling protocol that operates at the Data Link

Layer (Layer 2) of the OSI Reference Model. PPTP is a proprietary technique that encapsulates Point-to-Point Protocol (PPP) frames in Internet Protocol (IP) packets using the Generic Routing Encapsulation (GRE) protocol. Packet filters provide access control, end-to-end and server-to-server. PPTP was initially conceived by Ascend, developed by Microsoft, and described in IETF RFC 2637. See also Data Link Layer, frame, GRE, IETF, IP, IPsec, L2TP, OSI Reference Model, packet, PPP, protocol, server, SOCKS, and tunneling.

• routing
• routing by rumor
• Routing Information Protocol (RIP)
• RPELPC (Regular Pulse Excitation Linear Predictive Coding)
• RPR (Resilient Packet Ring)
• RPR (Resilient Packet Ring)
• RS 1. Recommended Standard
• RS 1. Recommended Standard
• RS-232
• RS-328 (Recommended Standard 328)
• RSA (Rivest-Shamir-Adleman)
• RSS (Really Simple Syndication or Rich Site Summary)
• RSVP (Resource Reservation Protocol)
• RTCP (Real Time Control Protocol)
• RTF (Rich Text Formatting)
• RTM (Ready To Market)
• RTP (Real Time Transport Protocol)
• rt (real-time)
• RTSP (Real-Time Streaming Protocol)
• RTS (Request To Send)
• rt-VBR (real-time Variable Bit Rate)
• rule of thumb
• rule of thumb
• rules of engagement
• rules of engagement