Which transport color is commonly assigned to private MPLS circuits?

• A. biz-internet
• B. public-internet
• C. mpls
• D. metro-ethernet

Answer: (C)

In SD-WAN, transport color is a tagging system used to identify the type of WAN path so routing and policies can treat each path appropriately. For a private MPLS circuit, the transport color is designated to reflect MPLS, typically labeled as “mpls.” This naming makes it clear that the path uses an MPLS backbone and should be treated differently from internet-based or Ethernet transports.

The other colors map to their respective transport types: biz-internet corresponds to a business internet path, public-internet indicates general internet access, and metro-ethernet refers to a private Ethernet service. So the best match for a private MPLS circuit is the transport color that explicitly represents MPLS.