What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?

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A、The Layer 2 switch forwards the packet and adds the destination MC address to its MC address table.
B、The Layer 2 switch sends a copy of a packet to CPU for destination MAC address leamning.
C、The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN.
D、The Layer 2 switch drops the received frame.

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选项 A 选项 B 选项 C 选项 D

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