4. Answer the following questions:

(10 points) Explain briefly how TCP Rena works (illustrate with graphic)

(10 points) Explain briefly how TCP protocol works in terms of connection setup and tear down.

(5 points) What are the differences between TCP Tahoe and TCP Reno.

(15 points) Consider Figure below (Figure 3.61 in the book). Assuming TCP Reno is the protocol experiencing the behavior shown above, answer the following questions. In all cases, you should provide a short discussion justifying your answer.

Identify the intervals of time when TCP slow start is operating.

Identify the intervals of time when TCP congestion avoidance is operating.

Identify the intervals of time when TCP segment loss detected by a timeout.