[chvrchbvrner]

In another article about the network abstraction layer "NetChannel" [1], the author describes that ACK happens by sending "Sequence" numbers in the headers.

[1]: https://fabiensanglard.net/quakeSource/quakeSourceNetWork.ph...

[justin66]

That’s about an earlier engine. Quite different.

(Regarding the original question, yes, of course there are sequence numbers. The “recommended readings” at the bottom of the page are worthwhile.)