Try Our Apps


The Word of the Year is...

negative acknowledgement

negative acknowledgement in Technology

1. (NAK) The mnemonic for ASCII character 21.
Sometimes used as the response to receipt of a corrupted packet of information.
Opposite of acknowledgement.
2. (NAK) Any message transmitted to indicate that some data has been received incorrectly, for example it may have a checksum or message length error. A NAK message allows the sender to distinguish a message which has been received in a corrupted state from one which is not received at all.
An alternative is to use only ACK messages, in which case the non-receipt of an ACK after a certain time is counted as a NAK but gives no information about the integrity of the communications channel.
See also ACK.

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source

Word of the Day

Word Value for negative

Scrabble Words With Friends

Nearby words for negative acknowledgement