Which UCS type corresponds to a non-use based underlay?

• A. Private UCS
• B. Public UCS
• C. Flat Rate UCS
• D. Non Shared Underlay Transport

Answer: (C)

Understanding how UCS pricing models map to underlay usage is what this item tests. In MEF SD-WAN, the underlay connectivity service can be provided as Private or Public in terms of where the underlay comes from, and it can also be delivered with different pricing models. A flat rate UCS is a pricing model where the customer pays a single fixed fee regardless of how much of the underlay is used. That non-use based structure means charges do not vary with traffic or utilization, which is exactly what “non-use based underlay” implies. The other options describe where the underlay comes from (private vs public) or how the underlay is shared, but they do not define a non-use based pricing model, so they don’t match the concept as closely.