Sec4: MAC table

CCNA 200-125, ICND1, Sec. 3: Hubs, History, and Why Hubs Are History

Switch 3 function

Switch don't know where is C is, so send it every port except source port.(Flood)

And update MAC table as A = F 0

Flood MAC address is ff:ff:ff:ff:ff:ff

For the second time, switch know which port should send packet.(Forward)

Also, update MAC table for PC C

Sooner or earlier, switch will complete MAC table.

When switch receive packet that source and destination ports are same, switch discard that packet.(Filter)