Which statement about MUX VLANs is accurate?

The accurate statement regarding MUX VLANs is that the MUX VLAN function must be enabled on an interface. This is essential because MUX VLANs serve to aggregate multiple subordinate VLANs under a principal VLAN, which streamlines VLAN management and enhances traffic segregation. For MUX VLANs to operate efficiently, the MUX function must be actively configured on the specific interface that will handle these VLANs. This ensures that the equipment correctly identifies and processes traffic from the various VLANs as part of the principal VLAN structure.

The other statements do not fully align with the functionality of MUX VLANs. While they might address certain characteristics of VLAN configurations, they do not accurately describe the necessity of enabling the MUX function for proper operation. In summary, enabling the MUX VLAN function on interfaces is a prerequisite for implementing effective VLAN management and ensuring that traffic is correctly handled according to the established VLAN hierarchy.