Consider sending a 2100-byte chunk of data using TCP from Host A to Host B. TCP segments are carried in IP datagrams (with a 20-byte header). IP datagrams are carried in a data link frame (with a 10-byte header). The maximum segment size for TCP is 800 bytes. The physical layer protocol can support a data rate of 1 Mbps. Assume a total round-trip time of 10 ms between the sender and the receiver.

a. How many frames will need to be sent from Host A to Host B? What is the size of each TCP segment? Explain.

b. Suppose the data must be sent over three links (from Host A to the first router, from the first router to the second router, and from the second router to Host B). How long will it take to create a TCP connection, deliver the data from Host A to Host B, and close the connection? Ignore any effects of TCP congestion control or flow control. Assume all links are lightly loaded so there are no queuing delays. Clearly state any assumptions made in determining the result. Include protocol diagram.