In the discussion of ARQ protocol in Section 3.3, a scenario was outlined that re sulted in the receiver accepting two copies of the same frame due to a loss of acknowledgement frame. Is it possible...

In the discussion of ARQ protocol in Section 3.3, a scenario was outlined that re sulted in the receiver accepting two copies of the same frame due to a loss of acknowledgement frame. Is it possible that a receiver may accept multiple copies of the same frame when none of the frames (message or acknowledgement) are lost?