forward
the frame to all ports except port 4.
E.
MAC Address Table
Port
1
3
MAC Address
12-34-56-78-9A-BF
12-34-56-78-9A-BD
PC1 12-34-56-78-9A-BC
2
3
PC3 12-34-56-78-9A-BE
The switch will discard the frame.
PC2 12-34-56-78-9A-BD
Q: 19
PC4 12-34-56-78-9A-BF
