Consider Figure 5.33. Now we replace the router between subnets 1 and 2with a switch S1

Chapter 5, Problem P15

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Consider Figure 5.33. Now we replace the router between subnets 1 and 2with a switch S1, and label the router between subnets 2 and 3 as R1.a. Consider sending an IP datagram from Host E to Host F. Will Host E askrouter R1 to help forward the datagram? Why? In the Ethernet frame containingthe IP datagram, what are the source and destination IP and MACaddresses?b. Suppose E would like to send an IP datagram to B, and assume that EsARP cache does not contain Bs MAC address. Will E perform an ARPquery to find Bs MAC address? Why? In the Ethernet frame (containingthe IP datagram destined to B) that is delivered to router R1, what are thesource and destination IP and MAC addresses?c. Suppose Host Awould like to send an IP datagram to Host B, and neither AsARP cache contains Bs MAC address nor does Bs ARP cache contain AsMAC address. Further suppose that the switch S1s forwarding table containsentries for Host B and router R1 only. Thus, Awill broadcast an ARP requestmessage. What actions will switch S1 perform once it receives the ARPrequest message? Will router R1 also receive this ARP request message? If so,will R1 forward the message to Subnet 3? Once Host B receives this ARPrequest message, it will send back to Host Aan ARP response message. Butwill it send an ARP query message to ask for As MAC address? Why? Whatwill switch S1 do once it receives an ARP response message from Host B?