View the exhibit.

The switches shown in the exhibit are HP Provision ASIC switches. Switches A, B, C, and D
implement MSTP using the settings shown in the exhibit. Switches B and C also connect to a
switch at the core, switch E, on dedicated VLANs that act like routed links. The network
administrator is not certain how or whether switch E implements MSTP. Which action should the
administrator take to prevent issues with the connection to the core?

A.
Disable MSTP on instance 0.

B.
Implement BPDU protection on the A1 ports on switch B and switch C.

C.
Implement BPDU filtering on the A1 ports on switch B and switch C.

D.
Make VLAN 100 part of MSTP instance 1 and VLAN 101 part of MSTP instance 2.

Explanation:
We should make sure that switch E does not use MSTP.
This can be achieved by enabling BPDU filtering on switch C ports which connects to the MSTP network.
Note: Understanding BPDU Filtering
The BPDU filtering feature can be globally enabled on the switch or can be enabled per interface,
but the feature operates with some differences.
At the interface level, you can enable BPDU filtering on any interface by using the spanning-tree
bpdufilter enable interface configuration command without also enabling the Port Fast feature.
This command prevents the interface from sending or receiving BPDUs.
Enabling BPDU filtering on an interface is the same as disabling spanning tree on it and can result
in spanning-tree loops.