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You want to run the new 802.1w on your switches. which of the following would enable this protocol?

Switch (config) # Spanning-tree mode rapid-pvst
Switch#spanning-tree mode rapid-pvst
Switch (config)#spanning-tree mode 802.1w
Switch#spanning-tree mode 802.1w

Correct Answer: Switch (config) # Spanning-tree mode rapid-pvst

Explanation:

802.1w is the also called Rapid Spanning Tree Protocol. It is not enabled by default on Cisco switches, but it is a better STP to run since it has all the fixes that the Cisco extensions provide with 802.1d

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