Instructions: Answer in space provided below each question. Deadline: 25 Dec 2022 Question 1 [2 Marks]: For the following scenario, calculate the minimum propagation delay from source to destination (The prorogation speed is 2108m/s ): Question 2 [1+1 marks]: Consider a 10Mb/s link that is 400km long, with packet length is 2,000 bits. What is the propagation delay for the link (take the speed of link as 2.5108 m/s) ? What is the transmission time for a packet? Question 3 [1+1 marks]: In a network device A and B are separated by two 2-Gigabit/s links and a single switch. The packet size is 6000 bits, and each link introduces a propagation delay of 2 milliseconds. How much the total delay if A sends a packet to B? Now, suppose we have three switches and four links, then what is the total delay if A sends a packet to B? Question 2 [1+1 marks]: Consider a 10Mb/s link that is 400km long, with packet length is 2,000 bits. What is the propagation delay for the link (take the speed of link as 2.5108 m/s )? What is the transmission time for a packet? Question 3 [1+1 marks]: In a network device A and B are separated by two 2-Gigabit/s links and a single switch. The packet size is 6000 bits, and each link introduces a propagation delay of 2 milliseconds. How much the total delay if A sends a packet to B? Now, suppose we have three switches and four links, then what is the total delay if A sends a packet to B? Question 4A [1 mark]: Map the OSI model layers to the TCP/IP suite layers. Write the complete name of each layer? Question 4B [1 mark]: Differentiate between the OSI reference model and TCP/IP protocol suite. Question 4A [1 mark]: Map the OSI model layers to the TCP/IP suite layers. Write the complete name of each layer? Question 4B [1 mark]: Differentiate between the OSI reference model and TCP/IP protocol suite. Question 5C [1 mark]: Design a hybrid topology: a 3-node Ring backbone with three Star networks (each has 4 nodes). Question 6 [1 mark]: Discuss and classify the key issues of Network criteria. Question 7 [2 mark]: Calculate the minimum total delay from sender to receiver (for both paths) if we send a 2GB file. The speed of link is 2.5108m/s. Each node has 2 microsecond processing delay and 3 millisecond queuing delay. Question 5A [1 mark]: Design a hybrid topology: a star backbone with three bus networks. Question 5B [1 mark]: Design a hybrid topology: a 3-node Mesh backbone with three Star networks. Question 5C [1 mark]: Design a hybrid topology: a 3-node Ring backbone with three Star networks (each has 4 nodes). Question 6 [1 mark]: Discuss and classify the key issues of Network criteria. Question 7 [2 mark]: Calculate the minimum total delay from sender to receiver (for both paths) if we send a 2GB file. The speed of link is 2.5108m/s. Each node has 2 microsecond processing delay and 3 millisecond queuing delay. Question 8A [2 mark]: Analyze how do packet delay and loss occur. Question 8B [2 mark]: Examine the difference between propagation delay and transmission delay. Question 8A [2 mark]: Analyze how do packet delay and loss occur. Question 8B [2 mark]: Examine the difference between propagation delay and transmission delay