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Cisco Certified Network Associate (CCNA) · Cisco
Select one answer.
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The question says "command entered on a port", option A is incorrect since that command can be issues only from global config mode, not from a port. Option C is correct, already tested in PT.
A is correct but you should not use this unless you it's only end devices being used.
int g0/2 spanning-tree portfast. You can also enable portfast with the following command: SW1(config)# spanning-tree portfast default (this enables portfast on all access ports (not trunk ports).