How does the Rapid Per VLAN Spanning Tree (RPVST) role on the boundary interface for VLANs get determined?

The correct approach to determining the Rapid Per VLAN Spanning Tree (RPVST) role on the boundary interface for VLANs involves checking whether the incoming Bridge Protocol Data Units (BPDUs) are superior to the BPDUs being processed. In the context of a network that uses Multiple Spanning Tree (MST) and Per VLAN Spanning Tree (PVST+), the boundary interface needs to evaluate the received BPDUs to configure its role accurately.

When a switch receives a BPDU from a connected switch operating in a different spanning tree mode (such as PVST+), it compares the information within that BPDU to ascertain whether it is a superior BPDU or not. If the received BPDU is found to be superior to the existing configuration (e.g., based on Bridge ID or Root ID), the switch can change its role on that VLAN accordingly. This is crucial for maintaining the stability and efficiency of spanning tree operations across different VLANs and spanning tree protocols.

In this scenario, the other options do not accurately capture the mechanism of the boundary interface determination. For instance, an inconsistency error may be reported in the event of configuration mismatches, but that doesn't directly influence the role assignment; it serves more as a diagnostic warning