Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the change of layer2…

BPDU filter disables STP on a port, preventing it from sending or receiving BPDUs, which could itself lead to loops if applied on an inter-switch link experiencing unidirectional failure.

Utilizing Loop Guard on SW2 on the port connected to SW3 is the correct solution. In a unidirectional link failure, if SW2 stops receiving BPDUs from SW3 but continues sending them, Loop Guard will detect the absence of BPDUs and place the port in an err-disabled state, preventing a Layer 2 forwarding loop.

BPDU guard is typically used on access ports connected to end devices to shut down the port if a BPDU is received, preventing unauthorized switches or loops, and is not designed for inter-switch links with potential unidirectional failures.

Root guard protects the STP root bridge placement by ensuring that a port never becomes the root port if a superior BPDU is received, but it does not address unidirectional link failures and the resulting loops.