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思科认证考试

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Refer to the exhibit. Based on the output of the show spanning-tree command,  which statement is true? ()

  • A、Switch SW1 has been configured with the spanning-tree vlan 1 root primary global configuration command.
  • B、Switch SW1 has been configured with the spanning-tree vlan 1 root secondary global configuration command.
  • C、Switch SW1 has been configured with the spanning-tree vlan 1 priority 24577 global configuration command.
  • D、Switch SW1 has been configured with the spanning-tree vlan 1 hello-time 2 global configuration command.
  • E、The root bridge has been configured with the spanning-tree vlan 1 root secondary global configuration command.
正确答案:B
答案解析:
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