Homework 2
quiz作业 | assignment代写 | 计算机网络 | network – , 这个项目是assignment代写的代写题目
Started: Jul 22 at 8:34pm
quiz Instructions
This is the second reading assignment, I am releasing it first to give everyone a chance to do the reading before the programming assignment since many students said that was helpful on the last assignment. The programming assignment will be released within 1-2 days.
The following RFCs are covered (again we will only be reading part of each of them)
https://datatracker.ietf.org/doc/html/rfc793 (https://datatracker.ietf.org/doc/html/rfc793)
Read RFC 793 section 1 https://datatracker.ietf.org/doc/html/rfc
Question 1^1 pts
What single new feature does TCP add to support reliability and flow control? Why is
it needed?
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Read section 2.2-2.3 in this RFC: https://datatracker.ietf.org/doc/html/rfc
Question 2^1 pts
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How does the TCP use the Internet Layer below it? Does TCP run on routers in the
internet?
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Read section 2.6 in this RFC: https://datatracker.ietf.org/doc/html/rfc
Question 3 1 pts
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What is the purpose of flow control? What does it mean if a sending TCP gets an
acknowledgment?
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*Read section 3.1 in this RFC: https://datatracker.ietf.org/doc/html/rfc
Question 4 1 pts
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Why are more bits allocated to the sequence numbers than to the port numbers?
Question 5 1 pts
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Why is there an additional psudo header for TCP? Why do you think this information
is not in the regular header?
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Read some of section 3.3 (through top of page 28) in this RFC:
https://datatracker.ietf.org/doc/html/rfc
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Question 6 1 pts
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Why is the 3 way handshake 3 and not some even number of messages?
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Question 7 1 pts
In RFC: https://datatracker.ietf.org/doc/html/rfc
(https://datatracker.ietf.org/doc/html/rfc793) look at figure 7 on page 37, what states in
the diagram on page 23 does host A go through? What about Host B? What about in
Figure 8 on page 38?
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Read sections 1-3.1 in https://datatracker.ietf.org/doc/html/rfc
Question 8 1 pts
Why do we use flightsize to choose the threshold and not CW size?
Question 9 1 pts
What should the initial value of ssthresh be? why?
Read section 3.2 in this RFC: https://datatracker.ietf.org/doc/html/rfc
(https://datatracker.ietf.org/doc/html/rfc5681)
Question 10 1 pts
Why do we not treat duplicate acks the same as a dropped packet?
Read section 4.2 in https://datatracker.ietf.org/doc/html/rfc
Question 11 1 pts
What kind of ACK is especially important to send quickly?
Skim the following RFC: https://datatracker.ietf.org/doc/html/rfc
(https://datatracker.ietf.org/doc/html/rfc7414)
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Question 12 1 pts
Pick any interesting development in TCP over the years and explain why you think it
happened. Indicate which section and page you found it on so we can grade it.
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