Answer the question please clearly.
[2 points] If all the links in the Internet were reliable, would the TCP reliable delivery service be redun-
dant? Why or why not?
2. [2 points] If you are to develop an application that sends high quality images from one end to another,
would you prefer TCP or UDP? Explain, why you have selected that protocol (TCP/UDP)? Put some
3. [2 points] In the rdt protocols described in class (and covered in textbook Section 3.4) what is the
purpose of sequence numbers and of timers.
4. [4 points] UDP and TCP use 1s complement for their checksum. Suppose you have the following three
8-bit bytes: 01010011, 01100110, 01110111. What is the 1s complement of the sum of these 8-bit bytes?
Why is it that UDP takes the 1s complement of the sum: that is, why not just use the sum? With
the 1s complement scheme, how does the receiver detect errors? Is it possible that a 1-bit error will go
5. [5 points] List all possible Congestion Control mechanism considering the following image and explain
all of them in detail.(see the attachment )