In a switch network, what is the primary role of BPDU Guard?

The primary role of BPDU Guard is to shut down ports receiving undesirable BPDUs. BPDU (Bridge Protocol Data Unit) Guard is a feature used in switching environments to maintain the integrity of spanning tree topology and to protect the network from potential disruptions caused by misconfigurations or unintended connections. When a switch port configured with BPDU Guard receives a BPDU, this indicates an unexpected situation or a potential loop, such as a device attempting to participate in the spanning tree protocol when it should not.

When BPDU Guard is enabled on a port, it will go into an error-disabled state upon receiving any BPDUs, effectively disabling that port. This action helps to prevent a scenario where a device, such as a rogue switch, becomes a part of the spanning tree and can influence the network topology in undesirable ways. In this manner, BPDU Guard acts as a safeguard, ensuring that only designated ports that are expected to send or receive BPDUs are allowed to participate in the spanning tree protocol, thus maintaining network stability and preventing loops.

The other options, while related to certain aspects of switching and spanning tree protocols, do not accurately describe the specific purpose of BPDU Guard. For instance, enhancing network performance, preventing root bridge election, or