Question: Please write legibly and neatly. For part I, please draw out the mathematical model to illustrate your understanding. And explain with reasoning. For part II,

Please write legibly and neatly. For part I, please draw out

Please write legibly and neatly. For part I, please draw out the mathematical model to illustrate your understanding. And explain with reasoning.

For part II, explain how and why providing TCP is redundant when the links already provide reliable delivery service.

Question 1 (I) Why both transport layer and link layer implement reliability mechanisms? Please prove your answer by presenting a mathematical model of the required number of transmissions over n hops. (II) Assume all the links from a source towards the destination provide reliable delivery service. Do we need TCP in the transport layer? Question 1 (I) Why both transport layer and link layer implement reliability mechanisms? Please prove your answer by presenting a mathematical model of the required number of transmissions over n hops. (II) Assume all the links from a source towards the destination provide reliable delivery service. Do we need TCP in the transport layer

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