Click the Exhibit button. Which campus fabric architecture is shown in the exhibit?

Question

Exhibit

Options

• Acore-distribution - edge-routed bridging (ERB)
• B5-stage IP Clos
• C3-stage IP Clos
• Dcore-distribution - centrally-routed bridging (CRB)

• A
  16% (4)
• B
  8% (2)
• C
  4% (1)
• D
  72% (18)

Explanation

The exhibit shows: L2 gateways (blue dots) positioned at the distribution layer. L3 gateways (red dots) positioned at the core layer. EVPN/VXLAN providing fabric connectivity between layers. Access switches forwarding traffic into the fabric without acting as gateways. This directly maps to the centrally-routed bridging (CRB) model, where: Bridging occurs at the access/distribution layer. Routing (L3 gateway) occurs centrally at the core layer. "In the core-distribution CRB model, Layer 2 gateways are deployed at the distribution switches, and Layer 3 gateways are deployed centrally at the core switches." Option A (ERB) is incorrect because ERB places the L3 gateway at the edge/access. Option B (5-stage IP Clos) is incorrect -- that topology has a leaf/spine architecture, not core/distribution. Option C (3-stage IP Clos) is incorrect -- that eliminates the distribution layer. Option D (CRB) is correct, matching the diagram exactly.

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