What is the virtual point-to-point path the service provider creates as a component of Underlay Connectivity Service?

• A. TVC
• B. SWVC
• C. PVC
• D. UNI

Answer: (A)

The concept being tested is how the service provider’s underlay network is connected between two points. In this model, the underlay connectivity is realized as a virtual point-to-point path called a Transport Virtual Circuit. This TVC is the operator-controlled, deterministic path that carries the traffic between the two network termination points, forming the foundation for any overlay services run over it.

Think of it as the dedicated “highway” the SD-WAN traffic travels on within the service provider’s network. It’s provisioned by the provider to guarantee the needed bandwidth, latency, and QoS for the customer’s services.

Why this fits best: a Transport Virtual Circuit is specifically described as a virtual point-to-point transport path used inside the underlay, whereas the other terms refer to different concepts. A PVC is an older permanent virtual circuit concept not typically used as the modern underlay path in MEF UCS. A Switched Virtual Circuit describes a circuit that is switched rather than a fixed transport path. A UNI is the interface at the customer edge, not the underlay path itself.