We are sending a 7.4kb file from a source host to a destination host. All links in the path between source and destination have a transmission rate of 8 Kbps. Assume that the propogation speed is 2 * 10^8 meters/sec, and the distance between source and destination is 40,000 km. SHOW ALL WORK.

a) If there is only one link between source and destination and the file is sent as one packet how much is the transmission delay? Please include headers in your calculation. In particular, assume that the file is sent using TCP over IPv6. Moreover the data link layer adds 26 bytes for header when forming the link layer frame. For TCP assume that the header added to the packet has the minimum possible size.

b) How much is end to end delay (transmission delay plus propogation delay) in the previous setup?

c) Now suppose there are eight links between source and destination (7 routers in the path between source and destination). Each link is 5000km long. Again suppose the file is sent as one packet. Suppose there is no congestion, so that the packet is transmitted onto the next link as soon as the router receives the entire packet. What is the end to end delay? Remember to add headers. (Hint: The router uses store and forward packet switching)

d) Now suppose that the file is broken into 10 packets. Ignore router processing delayss, but remember to add headers to the computation. Assuming store and forward packet switching at the router, what is the total delay?