4. The Ethernet interfaces of the hosts and the router shown in the figure are manually configured. Host 1 has just been connected to the LAN switch and has not yet transmitted any frame. The (a) Explain how this situation is resolved in practice: how does the router finds the Ethernet (b) Suppose that after the Ethernet address is obtained, while a frame is being sent from the router wants to send a packet to the IP address of Host 1 address of Host 1? State what protocol is used and enumerate all steps. router to Host 1, Host 2 transmits an Eth. frame to the router. Explain what are the necessary Ethernet interface and switch capabilities to prevent a collision in this case. Switch Host1 Host2 Router