Explain MEF's notion of service level agreement (SLA) in SD-WAN.

• A. An SLA is a list of hardware requirements for devices.
• B. An SLA defines performance targets (latency, jitter, packet loss, uptime) for applications or services across the SD-WAN fabric, with telemetry used to measure and enforce compliance.
• C. An SLA is a human-manual report of outages.
• D. An SLA defines pricing for services.

Answer: (B)

In MEF SD-WAN, an SLA defines the expected performance for applications across the network and specifies how that performance will be measured and enforced. It sets targets such as latency, jitter, packet loss, and uptime for particular applications or services, and it clarifies the scope and the measurement methods used to verify compliance. Telemetry—automated collection of performance data from the network—provides the evidence to compare actual performance against the targets and to trigger remediation if thresholds are breached. This continuous, measurable assurance is what keeps service quality predictable across the SD-WAN fabric, even as traffic moves across different paths or links. Other options describe hardware lists, manual outage reports, or pricing, which do not capture the ongoing measurement and enforcement aspect that an SLA provides.