How do endpoints inside an SD-Access network reach resources outside the fabric?
A. a VRF fusion router is used to map resources in one VN to another VN
B. Fabric borders use VRFs to map VNs to VRFs
C. SD-Access transit links are used to transport encapsulated traffic from one fabric to another
D. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network
Correct answer is B in my opinion.
Border Nodes
● Network virtualization extension to the external world—The border node can extend network virtualization from inside the fabric to outside the fabric by using VRF-lite and VRF-aware routing protocols to preserve the segmentation.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#Network_Components