|Authors:||James F. Kurose, Keith W. Ross|
Suppose that the roundtrip delay between sender and receiver is constant and known to the sender. Would a timer still be necessary in protocol rdt 3.0, assuming that packets can be lost? Explain.
Yes, a timer still is necessary in protocol rdt 3.0.
Reason: Assume the packet is loss, the sender knows the round trip delay time. It is used for estimate the transfer packet time.