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Assume the propagation delay in a broadcast network is 5 μs and the frame
transmission time is 10 μs.
a. How long does it take for the first bit to reach the destination?
b. How long does it take for the last bit to reach the destination after the first
bit has arrived?
c. How long is the network involved with this frame (vulnerable to collision)?
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I know this is a very old question but since I was also looking for this I’ll try to answer this.

 

  1. The time is taken for the first bit to reach the destination – $5\mu s$
    1. This is the definition of propagation delay
  2. The time is taken for the last bit to reach the destination after the first bit has arrived will be – $10\mu s$
    1. Again this is the definition of transmission time
  3. The network was involved for $10\mu s$ because the total transmission time taken was $10\mu s$

Please correct me if I’m wrong

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