When a signal with a standard Ethernet frame length of 64 Bytes is connected to the Ethernet board, if the QinQ function is enabled, what is the actual frame length of the signal inside the board?

When a signal with a standard Ethernet frame length of 64 Bytes is connected to the Ethernet board, if the QinQ function is enabled, what is the actual frame length of the signal inside the board?
A . 64
B . 84
C . 68
D . 80

Answer: C

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