Which term specifically refers to the software-defined interface between the user and the network in SD-WAN?

• A. UNI
• B. SD-WAN UNI
• C. SWVC
• D. TVC

Answer: (B)

The software-defined interface between the user and the network in SD-WAN is the SD-WAN UNI. Here, UNI stands for user–network interface, but in the SD-WAN context it’s the specialized, software-defined version that connects enterprise edge devices to the SD-WAN fabric. This interface enables centralized control, policy-based routing, and automated provisioning across multi-cloud and internet paths.

The generic UNI describes a user–network edge point in traditional networks, which is broader and not specific to the software-defined, centrally managed SD-WAN model. The other terms refer to transport/service circuit concepts (SWVC and TVC) and are not the software-defined user–network interface used in SD-WAN.