When influencing the STP priority by using the root command, what will the priority of the local switch become if all other switches have their default priorities?

A) 24,576
B) 32,768
C) 8192
D) 4096

A
Explanation: A) The spanning-tree vlan vlan-id root primary command is used to configure the local switch to become the root switch for a specific VLAN on the network (assuming PVST+). It does this by taking a look at the current root switch's priority. If its priority is higher than 24,576 (the default is 32,768), it will set the local switch's priority to 24,576. If the current root switch has a priority lower than 24,576, it will set the local switch's priority to the current root switch's priority minus 4096.