Refer to the exhibit. The entire MAC address table for SW1 is shownhere:
SW1#show mac-address-table
Mac Address Table
Vlan Mac Address Type Ports
000c.8590.bb7d DYNAMIC Fa0/1
010a.7a17.45bc DYNAMIC FaO/3
7aa7.4037.8935 DYNAMIC FaO/4
SW1#
What does SW1 do when Br-4 sends a frame to Br-2?
A.It inserts the source MAC address and port into the forwarding table and forwards the frame to Br-2. B.It maps the Layer 2 MAC address for FaO/3 to the Layer 3 IP address and forwards the frame. C.It performs a lookup in the MAC address table for Br-4 and discards the frame due to a missing entry. D.It floods the frame out of all ports except on the port where Br-2 is connected.正确答案A
