1. This question is based on the figure shown below. The figure shows the topology of the network, and the assigned IP address and MAC address. a) Consider sending an IP datagram from Host E to Host D. Will Host E ask router RI to help forward the datagram? In the Ethernet frame containing the IP datagram sending by E, what are the source and destination IP and MAC addresses? b) Suppose E would like to send an IP datagram to B, and assume that E's ARP cache does not contain B's MAC address, will E perform an ARP query to find B's MAC address? In the Ethernet frame (containing the IP datagram destined to B- the current expected receiver is B), what are the source and destination IP and MAC addresses? c) Suppose Host E would like to send an IP datagram to Host F, and neither E's ARP cache contains F's MAC address nor does F's ARP cache contain E's MAC address. Further suppose that the switch SI's forwarding table contains entries for Host F and router Rl only. Thus, E will broadcast an ARP request message. Once Host F receives this ARP request message, it will send back to Host E an ARP response message. But will it send an ARP query message to ask for E's MAC address? Why? In the Ethernet frame (containing the IP datagram destined to F -the current expected receiver is B), what are the source and destination IP and MAC addresses? d) Suppose now that the routerl is replaced by a switch 2. Suppose A would like to send an IP datagram to D, and assume that A's ARP cache does contain D's MAC address. Will A perform an APR query to obtain D's MAC address? In the Ethermet frame containing the IP datagram destined to D (the last hop communication with the next expected receiver is D), what are the source and destination IP and MAC addresses? A 192.168.1.001 1921682.00 4H4-4444-44-44 192.1683.001 7-77-77-77-77-77 LAN Router l Switch I LANG 192.168.1.8oz 22-22-22-22-22-22 33-33-33-33-33-33 192.168 2002 192.168.3.005 88-88-88-88-88-88 e192.168204 B 192168.1.003 192.1683.003 F8