N2Acknowledgements

The problem

1 s on screen = 100 ms

How does a sender know its message arrived?

Send it and hope

The wire loses 1 crossing in 10. Receiver answers each message; the sender never sends one twice.

Live metrics for each version of the scene
Send once	Resend	Change
—	—	—
0	0	—
—	—	—

N2Acknowledgements

A sender can't know a message arrived unless the receiver says so.