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Answered: Multiple Links between S & D1.1 - Propagation delay  $\approx$ 1ms Transmission delay for packet of 1000 bits = 1ms Now, consider a pipeline (as in Computer organization) with 8 stages(5  transmissions at source, destination and routers; 3 for propagation delays) with single stage delay of 1 ms(stage delay dictated by longest stage). So, total time = 999 stages(1 stage of each instriction except the last) + 8 stages(due to last instruction)                         = 1007 ms
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