What benefit does the principal and subordinate VLAN becoming the same provide in a MUX VLAN?

When the principal and subordinate VLANs are configured to be the same in a MUX VLAN, it indeed addresses certain VLAN configuration challenges. This setup simplifies the overall management of VLANs by reducing the complexity that arises from managing different identifiers for principal and subordinate VLANs.

By having the same VLAN ID, network administrators are able to streamline configurations and minimize the possibility of errors that could result from mismatched settings or overlooked entries in separate configurations. This unified approach can enhance operational efficiency, making it easier to deploy policies, troubleshoot issues, and ensure consistent application of security and access controls across the network segments involved.

While the other options may touch on various aspects of network performance or management, the specific focus on resolving configurational complexities is the core benefit realized when aligning principal and subordinate VLANs within a MUX VLAN architecture.