Acknowledgement (data networks)
WordNet
noun
(1) A statement acknowledging something or someone
"She must have seen him but she gave no sign of acknowledgment"
"The preface contained an acknowledgment of those who had helped her"
(2) The state or quality of being recognized or acknowledged
"The partners were delighted with the recognition of their work"
"She seems to avoid much in the way of recognition or acknowledgement of feminist work prior to her own"