The network operations center has received a call stating that users in VLAN 107 are unable to access resources through Router 1. From the information contained in the graphic, what is the cause of this problem?

A.
VLAN 107 does not exist on switch A.

B.
VTP is pruning VLAN 107.

C.
VLAN 107 is not configured on the trunk.

D.
Spanning tree is not enabled on VLAN 107.

Explanation:

In this example, VLAN 7, 101, 106, and 107 are being pruned. VLAN 107 is being pruned incorrectly in this case. By disabling VTP pruning, VLAN 107 should be able to once again gain access to the network resources.
Incorrect Answers:
A, B: Based on the output shown above, VLAN 107 is known and active within the management domain. Therefore, it must have been configured and the VLAN is indeed allowed to traverse the trunk. Only VLAN 101 has been configured to not pass along this trunk.
D: By default, STP is enabled on all VLANs.