3. If there are two routers over a package-switched network with the information listed below, how long does it take to send the same file from router A to router B?

the size of a packet is 1,280,000 bits

500 msec to process a packet

500 msec to queue for a slot

the length of the link between two routers is 10⁸ m

propagation speed in medium is 2x10⁸ m/sec

All links are 1.536 Mbps

Each link uses TDM with 12 slots/sec

500 msec to establish end-to-end circuit