Hello,
1) "If there was no circuit switching ..." -> you mean if store-and-forward was used instead? This question is examined in the Store and forward exercise: it would be N*(dprop + dtrans1) + dtrans2 - you can see this in figure 8 if you ignore dproc.
Do you mean something else?
2) I sketched an explanation. In it, dprop = 0, so that it is easier to see the point.
1) "If there was no circuit switching ..." -> you mean if store-and-forward was used instead? This question is examined in the Store and forward exercise: it would be N*(dprop + dtrans1) + dtrans2 - you can see this in figure 8 if you ignore dproc.
Do you mean something else?
2) I sketched an explanation. In it, dprop = 0, so that it is easier to see the point.
In the example, messages are sent in ascending order based on their size. The total duration is the same.
You "pay" to transmit A N times, and to transmit B, C, and D once each.
"and in the formula of the answer why is it that we multiply Dprop only N times?"
"and in the formula of the answer why is it that we multiply Dprop only N times?"
check figure 8 of the solutions. Only 1xdprop is added for every link.
