Packet Switching Vs. Circuit Switching Consider a wireless network of battery powered vibration sensors deployed to monitor the structural integrity of a building, each of which transmits data once every minute to an Internet connected gateway device. One way to conserve energy is to put the radio on the sensors to sleep mode when no packets are being transmitted or received by the sensor. Is this application more suited to run over a packet-switched network, or a circuit-switched network? Justify your answer. 2.) Internet Design In his SIGCOMM 1988 paper, David Clark describes the design goals that guided the development of the Internet protocols. Can you describe a positive artifact that is a result of the priority accorded to different design goals at the inception? Can you describe a negative artifact that is a result of the priority accorded to different design goals at the inception? How could this problem be addressed? 3. Network Delays (a) Nasa's Perseverance Rover landed on Mars in February 2021. Assume that the transmission was over a direct 32 kbps wireless link between Perseverance and NASAs Deep Space Network (DSN) on Earth. The distance between Mars and Earth is 200 x 10 km. The propagation speed of the wireless signal is 2 x 10% m/s. How long, in seconds, would it take for Perseverance to transmit a 2000 byte packet from Mars back to Earth? (b) Sometimes the Perseverance Rover can be out-of-the- sight from Earth due to Mars's rotations, and the direct link does not always work. In this case, the communication between the rover and the Earth is relayed by NASAs satellite, Mars Odyssey, currently orbiting around Mars. Assume the satellite implements store and forward communications. The distance between Perseverance and Odyssey is approximately 400 km and the distance between Odyssey and the Earth is 200 x 10' km. The wireless link between Perseverance and Odyssey is 2Mb/s, and the link between the Odyssey and the Earth is 64 kbps. The propagation speed of the wireless signal on both links is 2 x 10% m/s. How long, in seconds, would it take for Perseverance to transmit a 2000 byte packet from Mars back to Earth through Odyssey? State your assumptions