The network function (physical or virtual) at the Service provider side of the UNI is called what?

• A. Internet Breakout / Local Internet Breakout
• B. SD-WAN Edge
• C. Underlay Connectivity Services
• D. SD-WAN Service Components

Answer: (B)

In MEF SD-WAN terminology, the function at the service provider side of the UNI is called the SD-WAN Edge. This network function, which can be a physical device or a virtual appliance, sits at the provider edge and interfaces with the customer’s UNI. It terminates the SD-WAN overlay from the SP side, establishes and manages the overlay tunnels with the customer’s device, and enforces policies, security, and traffic routing across the WAN. Internet breakout describes where internet traffic exits the SD-WAN, not the name of the provider-side function. Underlay Connectivity Services refer to the actual transport layer, the physical/virtual pipes, rather than the SD-WAN overlay function. SD-WAN Service Components is a generic term for parts of the solution, not the specific function name. So the provider-side network function is SD-WAN Edge.