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What is the difference between PPTP and L2TP?

April 26, 2017L2TP PPTP

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What is the difference between PPTP and L2TP?

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The difference between L2TP and PPTP is that the former combines the control and data channels of the latter, and runs over UDP as opposed to TCP. UDP is a faster, leaner (and less reliable) protocol for sending packets that, because it does not retransmit lost packets, is commonly used in real-time Internet communications. PPTP, by contrast, separates the control and data channels into control stream that runs over TCP and a data stream that runs over GRE (a less popular Internet standard). Combining the control/data channels and using high-performance UDP makes L2TP more “firewall friendly” than PPTP — a crucial advantage for an extranet protocol — since most firewalls do not support GRE.