olemus
kättesaamist kinnitama, eeskätt sideprotokollides ja arvutisiinidel
Merriam-Webster:
3c: to make known the receipt of
acknowledge a letter

vahendeid
ASCII-koodid ACK (6₁₆) ja NACK (15₁₆)
Unicode-koodid U+2406 ja U+2415

ülevaateid
https://en.wikipedia.org/wiki/Acknowledgement_(data_networks)

näiteid
https://www.isi.edu/nsnam/DIRECTED_RESEARCH/DR_HYUNAH/D-Research/e-stop.gif
https://toschprod.files.wordpress.com/2012/01/tcp-com.png
https://image.slidesharecdn.com/tcp-130210043410-phpapp01/95/transmission-control-protocol-6-638.jpg