Given the following network, construct the routing table of router R1:Question 2 (7 marks)An organisation has been granted a block of addresses starting with the address 172.154.60.0/24. a) Create 4 subnets for this organisation with the first subblock of 120 addresses, the second subblock of 60 addresses, the third subblock of 30 addresses and the fourth subblock of 12 addresses. (1.5 marks for each correct answer)b) How many addresses are left? (1 mark)Question 3: (4 marks)Consider the following UDP header dump: BB400045003AFF10a) Identify the source port number. (0.5 marks)b) Identify the destination port number. (0.5 marks)c) What is the length of the data? (1 mark)d) Is it a packet from the client to the server or vice versa? (1 mark)e) What is the client process? (1 mark)