Which of the following best describes the private UCS underlay?

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

Answer: (A)

Private UCS underlay means the underlying transport is dedicated to your network, providing private, isolated paths for SD-WAN traffic. This setup uses private infrastructure (such as MPLS or dedicated fiber) so the resources aren’t shared with other customers, delivering more predictable performance, bandwidth guarantees, and tighter SLA adherence. In contrast, a public UCS underlay would run over shared public networks with less determinism for latency and jitter. Pricing terms like flat rate address cost, not the nature of the underlay, and while non-shared underlay transport conveys a similar idea of isolation, MEF specifically frames the private UCS underlay as a customer-dedicated, private transport solution.