CCNA Practice Exam Test Sample – Question 72

Refer to the exhibit.
q72-q
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.

Correct Answer: A,C,E
Section: LAN Switching Technologies

Explanation:
From the output, we see that all ports are in designated role (forwarding state).
The command “show spanning-tree vlan 30″ only shows us information about VLAN 30. We don’t know how many VLAN exists in this switch ->.
The bridge priority of this switch is 24606 which is lower than the default value bridge priority 32768.
All three interfaces on this switch have the connection type “p2p”, which means Point-to-point environment – not a shared media.
The only thing we can specify is this switch is the root bridge for VLAN 3o but we cannot guarantee it is also the root bridge for other VLANs.