NAK

Short for negative acknowledgement code, a transmission control character used to indicate that a transmitted message was received with errors or corrupted or that the receiving station is not ready to accept transmissions. The receiver sends the code to the sender to indicate that the transmission must be resent.

Compare with ACK.

Vangie Beal
Vangie Beal is a freelance business and technology writer covering Internet technologies and online business since the late '90s.

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