5. Let's consider the operation of a learning switch in the context of a network in which 6 nodes/hosts labeled A through F are star connected into an Ethernet switch. Assume that A is connected to swtich interface 1; B is connected to switch interface 2; C, interface 3; D interface 4; E interface 5; and F interface 6. Suppose that (i) A sends a frame to C, (ii) then C replies with a frame to A, (i then B sends a frame to A, (iv) then A replies with a frame to B. The switch table is initially empty. Show the state of the switch table before and after each of these events. For each of these events, identify the link(s) orn which the transmitted frame will be forwarded, and briefly justify your answers. 6. We discussed three categories of Medium Access Control (MAC) protocols: channel partitioning protocols, random access protocols, and taking turns protocols. Please list two specific protocols withirn each category and briefly describe how they work. 7. True or False: medium access control is required for point-to-point links. True or False: medium acces control is required for shared/broadcast links