Which command entered on a switch configured with Rapid PVST* listens and learns for a specific time period?

Which command entered on a switch configured with Rapid PVST* listens and learns for a specific time period?
A . switch(config)#spanning-tree vlan 1 max-age 6
B . switch(config)#spanning-tree vlan 1 hello-time 10
C . switch(config)#spanning-tree vlan 1 priority 4096
D . switch(config)#spanning-tree vlan 1 forward-time 20

View Answer

Answer: D

Explanation:

Forward time: Determines how long each of the listening and learning states last before the port begins forwarding.

Switch(config)# [ no ] spanning-tree vlan vlan_ID forward-time forward_time

Configures the forward time of a VLAN. The forward_time value can be from 4 to 30 seconds. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/15-02SG/configuration/guide/config/spantree.html#56177