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单项选择题 On switch R1 you issue the "udld enable" global command.  What does this command accomplish? ()

A、 Enables all fiber-optic LAN ports for Unidirectional LINK Detection (UDLD)

B、 Enables all copper media LAN ports Unidirectional Link Detection (UDLD)

C、 Overrides the default UDLS setting for all ports

D、 Globally enables all ports on the device for Unidirectional Link Detection (UDLS)

E、 None of the other alternatives apply

  • A
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