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Consider sending a 382.5 KB message over a path with eight (8) intermed...

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Consider sending a

382.5 KB

message over a path

with

eight (8)

intermediate nodes in a circuit

switched network and in a (lightly-loaded) datagram

packet-switched network. The propagation delay is

2.147

micro-seconds (us)

per hop and the data rate at each

node is

100 Mb/s

(Mega bits per second). 

Suppose the packet size is

425 Bytes

.

Assume that the packet headers can be ignored in the

packet-switched network and it is lightly loaded (in other words,

the queueing delays in each intermediate node are zero).

How big does the circuit setup

(S)

time have to

be in

micro-seconds (us)

for packet switching to

be the same or quicker than circuit switching. Round your answer

if needed.

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