QUESTION 1 Introduction to the a concept about Ethernet design limitation (see also Ch7 Minicase I.): One important issue in designing shared Ethernet lies in making sure that if a computer transmits a frame, any other computer that attempts to transmit at the same time will be able to hear the incoming frame before it stops transmitting, or else a collision might go unnoticed For example, assume that we are on the earth and send an Ethernet frame over a very long distance (maybe Moon). If a computer on the Moon starts transmitting at the same time as we do on Earth and finishes transmitting before our frame arrives at the Moon, there will be a collision, but neither computer will detect it; the frame will be garbled, but no one will know why So, in designing Ethernet, we must make sure that the length of the cable in the LAN is shorter than the distance the shortest possible frame travels Otherwise, a collision could go undetected The Question: The message length is: mil The Frame size is: 100 Bytes * The Circuit speed is: 100 Mbps (Also called the signaling speed, or the "dropping balls speed" in the analogy) The Propagation speed is: 200,000 km/sec The speed is less than speed of light to represent the delays in the circuit devices transmitting and receiving the message). Hint: . First: calculate the number of seconds it would take to transmit the frame Second: calculate the number of meters the signal would travel in that time, and you get the length of the message