Many freelancers work in the data network industry. In the telecommunications and data networking industries, acknowledgment is a signal passed between communicating processes or computers to signify acknowledgment as part of a communications protocol.
What is NAK?
NAK or negative acknowledgment is a protocol message that the sender receives when a message is not sent, the corrupt message is sent, or anything has gone wrong. This message might also show that the receiver’s station is not ready for transmission. Whenever this type of message is displayed, it’s mandatory to send the message again.
In practice, we can easily explain ACK NAK protocol differences:
ACK vs. NAK
ACK NAK protocol difference is that the NAK protocol (negative acknowledgment) is a protocol message that is sent when something’s gone wrong, for example: “We can not hear you.”, “I don’t understand.”, while ACK or acknowledgment protocol message signifies ”OK, understand, next.”
See below example of TCP ACK NAK protocol:
One example of Negative Acknowledgement is the internet’s Transmission Control Protocol (TCP). When computers communicate via TCP and received packets, they are acknowledged by sending a packet with an acknowledgment bit set.