[wat10000]

This is how old-school TCP figures out how fast it can send data, regardless of the underlying transport. It ramps up the speed until it starts seeing packet loss, then backs off. It will try increasing speed again after a bit, in case there's now more capacity, and back off again if there's loss.

[bombcar]

You can achieve a bit of performance here by tuning it so it will never exceed the true speed of the link - which is only really useful when you know what that is and can guarantee it.

[cylemons]

TCP still works this way?