4 results about "NAK" patented technology

The NAK protocol message is sent in many communications protocols to negatively acknowledge or reject a previously received message, or to indicate some kind of error. Many protocols are acknowledgement-based, meaning that they positively acknowledge receipt of messages. Transmission Control Protocol is an example of an ACK-based protocol. Other protocols are NAK-based, meaning that they only respond to messages if there is a problem. Examples include most reliable multicast protocols which send a NAK when the receiver detects missing packets. Still other protocols make use of both NAKs and ACKs. Bisync and Adaptive Link Rate is an example. A special case of the NAK protocol message is the negative-acknowledge character.