Optimizing a VPN isn't just about picking a protocol - choosing UDP or TCP can make a big difference, too.

How does one decide between TCP and UDP? This question was originally answered on Quora by Keith Winstein.

New so-called reliable UDP solutions offer an alternative to TCP. But are they worth the time or money to implement?

The advantage to using TCP for transporting the control protocol is that you’re guaranteed the control information is delivered. On the other hand, you also could use UDP if the protocol is ...