Multipath TCP: an overview

There are no end of those protocols. I work in academic networking and I've experienced my fair share of them. Usually they are to compensate for poor single-flow performance, a problem Linux generally doesn't have if you simply give enough memory to the autotuned TCP buffers.

MPTCP is the idea implemented well. That's a good thing, as it gives us a place to point users who think they might do better implementing this idea themselves.