[jeffbee]

I disagree. There is plenty of ossification coming from inside the house. Just some examples off the top of my head are the stuck-in-1974 minimum RTO and ack delay time parameters, and the unwillingness to land microsecond timestamps.

[otterley]

Not a networking expert, but does TCP in IPv6 suffer the same maladies?

[pumplekin]

Yes.

Layer4 TCP is pretty much just slapped on top of Layer3 IPv4 or IPv6 in exactly the same way for both of them.

Outside of some little nitpicky things like details on how TCP MSS clamping works, it is basically the same.

[ComputerGuru]

…which is basically how it’s supposed to work (or how we teach that it’s supposed to work). (Not that you said anything to the contrary!)