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- 单项选择题A user is unable to connect to the network. A network technician is able to determine that there is a problem on the switch. All other users on that switch are able to connect successfully to the network. Which of the following is a probable cause？（）
A、Switching loop is occurring on the switch.
B、Wrong subnet mask on the switch.
C、Incorrect SNMP settings on the switch.
D、Port is misconfigured on the switch.
- D
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