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Which of the following statements about the generation of TCNBPDU is correct?

Which of the following statements about the generation of TCNBPDU is correct?
A . If a port of a non-root bridge switch with STP enabled is connected to a PC, the switch will not generate TCN BPDU when the port enters the forwarding state.
B . If the link of a designated port of a switch in the network is broken, the switch will definitely generate a TCNBPDU
C . If the alternate port of a switch in the network is down, the switch will not generate TCN BPDU
D . When a switch port is selected as a designated port or root port, the switch will immediately send TCNBPDU

Answer: C

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