When a switch port is used as a VLAN trunk, which of the following trunk modes are valid?()
- A、Blocking
- B、Auto
- C、Desirable
- D、On
- E、Transparent
- F、Learning
正确答案:B,C,D
答案解析:有

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When a switch port is used as a VLAN trunk, which of the following trunk modes are valid?()
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