Compute the time required for circuit switching and packet switching with the following conditions:

? The destination is 3 hops away from the source (2 intermediate routers between the so urce and the destination, with 3 links).

? The distance betw een any two adjacent nodes is 10 Km.

? The signal propagation speed is 5x 10 5 m per se cond.

? The message size is 1 0 Mega bits (1 Mega = 10 6 )

? The maximum packet size is 100k bits (1k = 10 3 . You can ignore the size of the header.).

? The transmission speed of each link is 100Mbps.

? The circuit setup time is 10-

1 second for the case of circuit switching.

? The processing time for routing decision at each node is negligible. In this case, which switching method h as a shorter completion time? If the message size can be enlarged, is there a chance the other switching method can be better?

Note:

Please show your computation steps.