--CC3071 W1 Computer Networks Student ID: Max Marks:70 Assignment #2 Name: Submission Date: 4th Nov April 2022 Dated: 25/10/2022 Program(BS SE): 1.) How long does it take to transmit x KB over a y-Mbps link? Give your answer as a ratio of x and y. (5 marks) 2.) Calculate the total time required to transfer a 1000-KB file in the following two a) cases, assuming an RTT of 100ms, a packet size of 1KB data, and an initial 2 x RTT of "handshaking" before data is sent. The bandwidth is 1.5 Mbps, and data packets can be sent continuously. b) The bandwidth is 1.5 Mbps, but after we finish sending each data packet we must wait one RTT before sending the next. c) The bandwidth is "infinite" meaning that we take transmit time to be zero, and up to 20 packets can be sent per RTT. The bandwidth is infinite, and during the first RTT we can send one packet (21-1), during the second RTT we can send two packets (22-1), during the third we can send four (23-1), and so on. 3.) Consider a LAN with a maximum distance of 4km. At what bandwidth would propagation delay (at a speed of 2.2 x 10^8 m/s) equal transmit delay for 100-byte packets? What about 512-byte packets? 4. How "wide" is a bit on a 1-Gbps link? How long is a bit in copper wire, where the speed of propagation is 2.3 x 10^8 m/s? Calculate the "width (in sec)" and "length (in meters)" of the bit on a 1.5-Mbps link of again a copper wire. 5. Suppose a 100-Mbps point-to-point link is being set up between the earth and a new lunar colony. The distance from the moon to the earth is approximately 385,000 km, and data travels over the link at the speed of light - 3 x 10^ ms. a.) Calculate the minimum RTT for the link *b b.) Using the RTT as the delay, calculate the (delay * bandwidth) product for the link. c.) What is the significance of the delay X bandwidth product for the link?