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Unformatted text preview: A to B, indicate the value of SN. For those segments transmitted from B to A, indicate the value of ACK. b) What is the transmission delay of one segment? c) How long will it take for host A to send the file to B until the last ACK segment is received? 3. Consider a reliable data transfer protocol that uses only negative acknowledgments (NAK). It means that a control message is sent from the receiving host to the sending host when error in a receiving packet is detected. a) Suppose the sender sends data only infrequently. Would a NAK-only protocol be preferable to a protocol that uses ACKs? Why? b) Now suppose the sender has a lot of data to send and the end-to-end connection experiences few losses. In this case, would a NAK-only protocol be preferable to a protocol that uses ACKs? Why?...
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- Spring '11