How does MEF define interoperability test criteria for SD-WAN?

• A. Ad-hoc vendor tests with no standards
• B. Only internal lab tests
• C. Through standardized test suites, reference architectures, and open APIs to validate cross-vendor interoperability
• D. User acceptance testing only

Answer: (C)

Interoperability testing in MEF SD-WAN is built around using standardized test suites, reference architectures, and open APIs to validate cross-vendor interoperability. Standardized test suites provide repeatable, objective criteria so every vendor is tested against the same concrete requirements, ensuring consistent results. Reference architectures give a common blueprint for how SD-WAN components should be composed and interact, so a solution from one vendor can mesh with components from others in a real deployment. Open APIs enable different vendors to expose compatible interfaces for provisioning, policy management, monitoring, and control, which is essential for end-to-end automation and seamless cross-vendor operation. Together, these elements create a reliable, repeatable way to prove that diverse vendor implementations can work together in a MEF-compliant SD-WAN service.

Ad-hoc vendor tests lack standardized criteria, internal lab tests focus on a single vendor without cross-vendor validation, and user acceptance testing centers on customer requirements rather than guaranteed cross-vendor interoperability.