Refer to the exhibit.
The output that is shown is generated at a switch. Which three statements are true? (Choose three.)
A.
All ports will be in a state of discarding, learning, or forwarding.
B.
Thirty VLANs have been configured on this switch.
C.
The bridge priority is lower than the default value for spanning tree.
D.
All interfaces that are shown are on shared media.
E.
All designated ports are in a forwarding state.
F.
This switch must be the root bridge for all VLANs on this switch.
Not sure about A. any comments?
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The switch uses RSTP which has only three states for ports: discarding, learning or forwarding. And since we are shown only the info for VLAN 30 we can not be sure what is going on for other VLANs on this switch (it might be root for all of them, but it might not, so ports could be in either state depending on the location of root switch and the path from this switch to the root switch). For example, if this switch is not root for VLAN 10, then some ports that belong to VLAN 10 will be in forwarding state (root port and designated ports) and the rest will be in discarding state.
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