The exhibit shows the topology for a network with 30 access layer switches (only two are
shown).Every switch-to-switch link is a Gigabit link. Every area network (VLAN) interface runs.
Open Shortest Path First (OSPF) and has the IP address shown in the exhibit. The other interface
settings are defaults.

The access layer switches support several more VLANs not shown in the exhibit and also run
Multiple Spanning Tree protocol (MSTP) loops.

What is one recommendation for enhancing convergence time and resiliency for this solution?

A.
Place all of the switch-to-switch links in the same VLAN.

B.
Lower the cost of the VLAN interfaces to reflect the high speed of the links.

C.
Add a BPDU filter to the VLAN interfaces shown in the exhibit.

D.
Raise the OSPF times on the VLAN interfaces.