The correct answer is B. to connect wired endpoints to the SD-Access fabric.
In Cisco SD-Access, the fabric edge node is the device that provides access for endpoints into the fabric. It is the point where user devices such as PCs, phones, printers, and access points attach to the SD-Access network. The edge node handles endpoint onboarding into the fabric and applies the appropriate segmentation and policy.
A fabric edge node is specifically responsible for:
Serving as the access-layer entry point into the SD-Access fabric
Enforcing policy and segmentation for connected endpoints
Extending the fabric to end hosts
This is the main role of the edge node in the SD-Access architecture.
A. to connect the fusion router to the SD-Access fabric This is not the role of the fabric edge node. The fusion router is used outside the fabric to provide connectivity between the fabric and external networks.
C. to advertise fabric IP address space to external networks This function is associated with the border node, not the edge node. The border node connects the fabric to external domains and exchanges reachability information.
D. to connect external Layer 3 networks to the SD-Access fabric This is also the function of the border node, not the edge node.
Remember these SD-Access node roles clearly:
Border node = connects to external networks
Control-plane node = maintains endpoint-to-location mappings
Fusion router = external routing/services outside the fabric
Edge node = endpoint access into the fabric
