networking - Implementing rdt 1.0 (reliable data transfer) in java, rtd_send(packet) -


so project have implement rdt in java using simulator has been coded me, have sender , receiver classes (entities). this diagram of happening. whenever try udt_send(packet) or rdt_send(packet) error 'cannot find symbol' rtd , utd. presumed pre-set thing in java evidently not, ideas of i'm supposed or how rtd or utd meant work? guys.

p.s. unidirectional transfer of data required.


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