1. Suppose there are two "store and forward routers between your home and your friend's home. You have a 10Mbps link from your home to the first router, and your friend also has a 10Mbps link to their router. Between the two routers there is a 1Gbps link. How much time will it take for a 1500byte packet sent from your home to completely arrive at your friend's home? Ignore propagation, queuing, and processing delays. Network is packet switched. Show the workings of your answer. You 10Mbps Your friend 10Mbps 1Gbps 2. Suppose the above network was circuit switched, and it incurs a circuit establishment delay of 10ms. Would it be more efficient than the packet switched network for a single 1500byte packet? 3. Instead of a single 1500byte packet, suppose a series of 100 such packets was sent over the packet switched network of Q1.1 and a similar series of packets was sent over the circuit switched network of Q1.2. Which network is more efficient? 4. Suppose you want to send a total of 100 1500byte packets to your friend and they want to do the same (send 100 1500byte packets to you). You generate 1 packet every 20ms, and your friend also generates new packets at the same rate (1 packet every 20ms). Luckily, you establish a circuit switched connection with your friend before they can, and tear down the connection only after you are done with your transmission. The network supports a single unidirectional connection at one time. How long will it take for your friend's last 1 packet to reach you? Assume connection setup time is 5ms, but connection tear down is instantaneous after the last packet is delivered