Question

1. A 6-node network is connected into an Ethernet switch implementing a star topology. Nodes are labeled A through F, and their MAC addresses follow M-A, M-B, and so on. Suppose that the following frames are sent a. A sends a frame to E b. Ereplies with a frame to A c. F sends a frame to B d. B replies with a frame to F e. D sends a frame to A The Ethernet switch table is initially empty. Show the state of the switch's forwarding table before and after each of these events. For each of these events, identify the link(s) on which the transmitted frame will be forwarded, and justify your answers. Use the following table to provide your answers. Switch Table State Link(s) packet isExplain forwarding action Action What happens?)forwarded to sends a frame to replies with a frame to sends a frame to replies with a frame to sends a frame to

Answer 1

(a)A sends a frame to E
Initially switch table is empty.Hence switch will forward packet to all other hosts(B,C,D,E,F).And will update switch table with M-A entry.
Switch Table Status:
   M-A

(b)E replies with a frame to A.

As switch table contain MAC address of Host A.switch will forward packet to A. And will update switch table with M-E entry.
Switch Table Status:
   M-A
   M-E

(c)F sends a frame to B
As switch table do not contain MAC address of Host B.Hence switch will forward packet to all other hosts(B,C,D,E,A).And will update switch table with M-F entry.
Switch Table Status:
   M-A
   M-E
   M-F
(d)B replies with a frame to F.

As switch table contain MAC address of Host F.switch will forward packet to F. And will update switch table with M-B entry.
Switch Table Status:
   M-A
   M-E
   M-F
   M-B
(e)D sends a frame to A
As switch table contain MAC address of Host A.Hence switch will forward packet to all other host A.And will update switch table with M-D entry.
Switch Table Status:
   M-A
   M-E
   M-F
   M-B
   M-D