Q5 (a) Analyse Figure Q5. Subnet 1 and 2 are connected with a switch S1, while Subnet 2 and 3 are connected using a router labelled as Ri. Consider sending an IP datagram from Host E to Host F in Figure Q5. (i) Determine whether Host E will ask router R1 to help forward the datagram or not. (1 marks) Give your justification for your answer in Q5(a)(i) ? (4 marks) (iii) In the Ethernet frame containing the IP datagram, provide the source and destination IP and MAC addresses? (6 marks) (b) Suppose E would like to send an IP datagram to B in Figure Q5, and assume that E's ARP cache does not contain Bs MAC address. (i) Determine whether Host E will ask router R1 to help forward the datagram or not. Explain you answer. (3 marks) (ii) In the Ethernet frame that containing the IP datagram destined to B that is delivered to router Ri, provide the source and destination IP and MAC addresses? (6 marks) A E B D Subnet 1 F Subnet 3 Subnet 2 Figure Q5: Three subnets, interconnected by routers