300-420 Question #371: Real Exam Question with Answer & Explanation

Question

In a Cisco SD-Access fabric, which node is equivalent to an access layer switch in a traditional three-tier campus network design?

Options

• Aedge node
• Bborder node
• Cintermediate node
• Dcontrol plane node

Explanation

In a Cisco SD-Access fabric, the edge node performs the equivalent function of an access layer switch in a traditional three-tier campus network design.

Common mistakes.

• B. A border node connects the SD-Access fabric to external networks, acting as a gateway, similar to a core or distribution layer switch connecting to the rest of the enterprise or the internet in a traditional design.
• C. An intermediate node (also known as an internal border node in some contexts or a transit node) typically sits between edge and border nodes, mainly providing routing and forwarding within the fabric underlay but does not directly connect endpoints.
• D. A control plane node (often a LISP map-server) manages the endpoint-to-location mapping database (HTDB) and provides mobility services, a function distinct from directly connecting endpoints.

Concept tested. Cisco SD-Access node roles, edge node

Reference. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/sda_design_guide/sda_design_guide.html

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