Selected Answer: A int g0/2 spanning-tree portfast. You can also turn on portfast with this command: SW1(config)# spanning-tree portfast default (this enables portfast on all access ports (not trunk ports).

A is correct. You can enable spanning-tree portfast from the interface configuration or use spanning-tree portfast default in the global configuration command. https://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/trash/swstpopt.html

I think there is no correct answer in the options. The correct answer should be: switch(config-if)#spanning-tree portfast

Incorrect. You can configure portfast on trunk links with the following command in interface configuration mode: spanning-tree portfast trunk. It is only recommanded that you only use portfast on access ports but you can definitely configure portfast on trunk ports.

Correct anwser is C

Port Fast only works with access ports

Selected Answer: A A is correct but you should not use this unless you it's only end devices being used.

You are right. But the question says "command on a port". So one would expect it is referring to the interface command.

Selected Answer: C The question says "command entered on a port", option A is incorrect since that command can be issued only from global config mode, not from a port. Option C is correct, already tested in PT.