Which term describes an underlay that has usage-based rate charges?

• A. Backup UCS
• B. Usage-based UCS
• C. SWVC Reserved Prefixes
• D. SWVC End Point Identifier

Answer: (B)

Pricing for the underlay in MEF SD-WAN is defined by the billing model, and the phrase that clearly communicates a charge based on how much you use is the one that combines the underlay service with a usage-based pricing model. Using “Usage-based UCS” signals that the underlay connectivity service is billed according to actual usage (for example, amount of data, bandwidth, or time used), rather than a flat fee. The other terms describe different underlay concepts (backup functionality, reserved prefixes, or endpoint identifiers) and do not address how charges are assessed, so they don’t convey a usage-based pricing model.