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Consider the following network, and assume that each node initially knows the costs to each of its neighbors. Consider the distance-vector algorithm. Suppose that all nodes send the first distance vector updates at the same time.  [3 points] Show the initial distance vector of node F. [3 points] Use the Bellman-Ford Equation to calculate the distance vector of node F after receiving the first updates.

The figure below illustrates an IPsec configuration in the tunnel mode with the ESP header, in which the IPsec gateways are located at R1 and R2. Answer the following True/False questions, and briefly justify your answers. A. [2 points] When a host in 172.16.1/24 sends a datagram to an Amazon.com server, the router R1 will encrypt the datagram using IPsec. B. [3 points] Consider sending a TCP segment from a host in 172.16.1/24 to a host in 172.16.2/24. Suppose the acknowledgment for this segment gets lost, so that TCP resends the segment. Because IPsec uses sequence numbers, R1 will not resend the TCP segment.

The figure below illustrates an IPsec configuration in the tunnel mode with the ESP header, in which the IPsec gateways are located at R1 and R2. Answer the following True/False questions, and briefly justify your answers. A. [2 points] When a host in 172.16.1/24 sends a datagram to an Amazon.com server, the router R1 will encrypt the datagram using IPsec. B. [3 points] Consider sending a TCP segment from a host in 172.16.1/24 to a host in 172.16.2/24. Suppose the acknowledgment for this segment gets lost, so that TCP resends the segment. Because IPsec uses sequence numbers, R1 will not resend the TCP segment.

Choose ONE of the following. Remember that you are handwriting this essay and do not need to submit anything but your name in the textbox: “Hitler followed a carefully planned foreign policy between 1933 and 1939.” To what extent do you agree with this statement? “The weakness of collective security was the main reason for Chamberlain’s signing of the Munich Agreement.” Discuss.

Which of the following includes the biggest block of time?

What substance is produced by the liver and stored in the gall bladder?

What substance is produced by the liver and stored in the gall bladder?

Centipedes have 2 pairs of legs per body segment.

What is the name given to the structure that separates the left side of a mammalian heart from the right side of a mammalian heart?

What organ of the digestive system is responsible for nutrient absorption?