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350-401 · Question #717

What is a characteristic of the overlay network in the Cisco SD-Access architecture?

The correct answer is C. It provides isolation among the virtual networks and independence from the physical network.. The Cisco SD-Access overlay network provides logical separation and isolation for virtual networks, making them independent from the physical underlay infrastructure.

Submitted by ravi_2018· Mar 6, 2026

Question

What is a characteristic of the overlay network in the Cisco SD-Access architecture?

Options

  • AIt uses a traditional routed access design to provide performance and high availability to the network.
  • BIt consists of a group of physical routers and switches that are used to maintain the network.
  • CIt provides isolation among the virtual networks and independence from the physical network.
  • DIt provides multicast support to enable Layer 2 Hooding capability in the underlay network.

How the community answered

(20 responses)
  • A
    5% (1)
  • C
    90% (18)
  • D
    5% (1)

Why each option

The Cisco SD-Access overlay network provides logical separation and isolation for virtual networks, making them independent from the physical underlay infrastructure.

AIt uses a traditional routed access design to provide performance and high availability to the network.

SD-Access aims to simplify and move beyond traditional routed access designs by introducing a fabric-based architecture with an overlay.

BIt consists of a group of physical routers and switches that are used to maintain the network.

This describes the underlay network, which is the physical infrastructure, not the logical overlay network that sits on top of it.

CIt provides isolation among the virtual networks and independence from the physical network.Correct

The overlay network in Cisco SD-Access utilizes VXLAN to create virtual networks, providing complete isolation between these virtual segments and decoupling them from the physical topology of the underlying network.

DIt provides multicast support to enable Layer 2 Hooding capability in the underlay network.

While multicast support in the underlay is often necessary to support VXLAN, the overlay itself provides the isolation and virtual networking, rather than directly enabling Layer 2 flooding in the underlay.

Concept tested: Cisco SD-Access overlay network characteristics

Source: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html

Topics

#Cisco SD-Access#SD-Access overlay network#Network virtualization

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