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In different scenarios, RSTP provides different protection functions. Which of the following is wrong?

In different scenarios, RSTP provides different protection functions. Which of the following is wrong?
A . For a designated port with root protection enabled, its port role can only remain as a designated port.
B . After enabling the anti-TC-BPDU packet attack function, the number of times the switching device processes IC BPDU packets within a unit time can be configured.
C . After the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set as a non-edge port and the spanning tree calculation will be re-calculated.
D . Enable root protection on the designated port. When the port receives a better RST BPDU, the port will enter the Discarding state and no longer forward packets. If the port does not receive a better RST BPDU within a period of time, it will automatically return to the normal Forwarding state.

Answer: C

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