Question: Consider a reliable data transfer protocol that does not use acknowledgements (ACKs) but instead uses negative acknowledgements (NAKs). A NAK is sent when a node

Consider a reliable data transfer protocol that does not use acknowledgements (ACKs) but instead uses negative acknowledgements (NAKs). A NAK is sent when a node observes a gap in the sequence numbers of the packets. NAKs and timeouts can both result in retransmissions. Suppose the sender has a lot of data to send and the end-to-end connection experiences few losses. Is a NAK-only protocol preferable to using ACKs? Why or why not?

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