noun
acknowledgment; receipt notification
In computing, a signal or message sent to confirm that data has been received successfully.
サーバーから受信通知が届いたら、次のデータを送信してください。
Once you receive an acknowledgment from the server, please send the next data.
More general term for acknowledgment in communication, not limited to computing.
Compound of 受信 (reception) and 通知 (notification).