Which two Cisco SD-Access components provide communication between traditional network elements and the controller layer? (Choose two.)

Question

Options

• Anetwork underlay
• Bpartner ecosystem
• Cnetwork control platform
• Dfabric overlay
• Enetwork data platform

• A
  92% (24)
• C
  4% (1)
• E
  4% (1)

Explanation

SD-Access Communication Between Traditional Elements and Controller Layer

Network Underlay (A) and Fabric Overlay (D) are correct because the underlay provides the physical/routed network infrastructure that traditional network elements connect to and communicate through, while the fabric overlay creates the virtual network layer (using VXLAN/LISP) that interfaces with the controller layer to enable policy-based communication across both traditional and SD-Access environments.

Why the distractors are wrong:

• Partner Ecosystem (B) refers to third-party integrations and vendors, not a communication component between network elements and the controller.
• Network Control Platform (C) is the controller layer itself (DNAC/Cisco DNA Center), not a bridge to it.
• Network Data Platform (E) is an analytics/telemetry component used for assurance and monitoring, not for bridging traditional elements to the controller.

Memory Tip: Think of it as a sandwich - the underlay is the bottom layer (physical connectivity for traditional devices), the overlay is the top layer (virtual fabric talking to the controller), and everything else (NCP, NDP, partners) lives within or around that sandwich rather than forming its bread.

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