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Question 3 a) A computer network has been configured as shown in Figure 2. The IP address, subnet mask, and default gateway of PC_1, PC_2, PC_3, PC_4 and the IP address of each interface of the four routers are given as shown in the figure. Assume the forwarding table of each router has been corrected configured. PC_4 PC_4 PC_2 IP: 10.10.10.3 Subnet mask:255.255.255.240 Default gateway 192.168. 10,6 IP: 10.10.16.243 Subnet mask:255.255.255.0 Default gateway: 10.10.16.2 192.168.10.6 10.10.162 R4 R2 192.168.10.2 192.168.10.9 192.168.10.22 192.168.10.10 192.168.10.1 R1 192.168.10.21 192.168.10.5 192.168.10.6 172.16 30.2 172.16.40.13 PC_1 PC 3 IP: 172.16.30.182 IP: 172.16.40.256 Subnet mask:255.255.255.0 Subnet mask:255.255.255.0 Default gateway: 172.16.302 Default gateway: 172.16.40.13 PC 1 Figure 2 i) Can PC_1 communicate successfully with PC_3? Explain your answer. ii) Can PC_2 communicate successfully with PC_4? Explain your answer. ii) What is the network address of the subnet which PC_4 is connected to? What is the maximum number of hosts that can be supported in this subnet? iv) Assume a new device, PC_x is joining the network and would like to obtain an IPv4 address automatically. Explain which protocol can facilitate this and the steps of the information exchange between PC_x and the server that runs this protocol. [15 marks]