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What is the behaviour of a typical Ethernet switch when it receives a frame with a unicast destination MAC add

What is the behaviour of a typical Ethernet switch when it receives a frame with a unicast
destination MAC address? (Choose two)

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A.
The switch floods the frame out of all ports except the port on which it was received.

B.
The switch looks in its FDB. If the source address is unknown it discards the frame.

C.
The switch looks in its FDB. If the destination address is known it forwards the frame out
the appropriate interface.

D.
The switch looks in its FDB. If the destination address is unknown it floods the frame out
all ports except the port on which it was received.

E.
The switch looks in its FDB. If the destination address is unknown it discards the frame.

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