8. (1.5 points) When the first packet is being sent from the first router to the second one, the second packet is on its way to the first router. At what time will the second packet be fully received by the second router? a. 2 sec. b. 4 sec. C. 5 sec. d 10 sec. e. None of the above. 9. (1.5 points) How much time is required to receive the first packet at the destination host. a. 5 m sec. b. 10 m sec. c. 10 u sec d. 15 m sec e. None of the above. 10. (1 point) What is the total time to move the message to destination host when the message is divided into 800 packets? a. 4.01 sec. b. 4.01 m sec. c. 14.10 sec. d. 14.10 m sec. e. None of the above. For questions 11-13, consider the following description: Consider a frame consisting of 10 Bytes being transmitted over a noisy channel. Assume that the probability of bit erToT (BER) is 0.01 and it is independent for each bit. Find the following: 11. (1.5 points) The probability that the frame arrives with no bit errors, a. 0.44 b. 0.56 C. 0.99 d. None of the above. 12. (1.5 points) What is the probability that the received frame contains at least one error? a. 0.44 6. 0.56 C. 0.99 d. None of the above. For questions 5-10, consider the following description: Consider a message with a length of 8x10 bits is to be sent from a source to a destination via a packet-switched network. The source and the destination are separated by two routers as shown below. Suppose each of the three links in this path is 2 Mbps. Ignore propagation, queueing and processing delays. Source Destination 5. (1.5 points) Consider sending the message without breaking it into smaller packets. How long does it take to move the message from the source to the first router? a. 2 sec. b. 4 sec. c. 5 sec. d. 12 sec. e. None of the above 6. (1.5 points) Keeping in mind that each router uses a store-and-forward packet switching, what is the total time to move the message from source to destination? a. 2 sec. b. 4 sec. C. 10 sec. d. 12 sec. e. None of the above. 7. (1.5 points) Now suppose the packet is divided into 800 packets with each packet being 10000 bits long. How long does it take to move the first packet to the first router? a. 2 b. 4 sec. c. 5 sec. d. 10 sec. e. None of the above