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Acknowledgement Code (ACK)

Definition - What does Acknowledgement Code (ACK) mean?

An acknowledgment code (ACK) is a type of unique signal that a computer sends to show that data has been transmitted successfully. The acknowledgement code is an ASCII character that has been designated to serve as a signal between sender and recipient.

An acknowledgment code is also known as an acknowledgment character.

Techopedia explains Acknowledgement Code (ACK)

The acknowledgement code illustrates the ways that various senders and receivers handle blocks of data. There is a certain protocol or familiar size for a data block, to which the sender data must conform. When the recipient gets the right data block, it sends the acknowledgement code back to the sender, and then the sender sends another block. This iterative process helps ensure that large amounts of data get delivered from a sender to a receiver effectively.

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