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350-401 · Question #1146

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

The correct answer is B. It provides isolation among the virtual networks and independence from the physical network.. The overlay network in Cisco SD-Access provides isolation among virtual networks and operates independently from the underlying physical network.

Submitted by manish99· Mar 6, 2026

Question

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

Options

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

How the community answered

(25 responses)
  • B
    88% (22)
  • C
    8% (2)
  • D
    4% (1)

Why each option

The overlay network in Cisco SD-Access provides isolation among virtual networks and operates independently from the underlying physical network.

AIt provides multicast support to enable Layer 2 flooding capability in the underlay network.

The overlay network provides multicast support, but it's not to enable Layer 2 flooding capability in the underlay network; rather, it's to transport multicast traffic over the underlay and within the overlay's virtual networks.

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

The overlay network, typically built with VXLAN encapsulation, creates virtual networks (VNIs) that segment traffic and provide logical separation, allowing different groups or purposes to coexist on the same physical infrastructure. This abstraction makes the logical network independent of the physical infrastructure details.

CIt uses a traditional routed access design to provide performance and high availability to the

The SD-Access architecture utilizes an overlay network over an underlay, moving away from traditional routed access designs to provide greater flexibility and scalability for virtual network segmentation.

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

The overlay network is a logical construct built on top of the physical routers and switches (the underlay), not a group of physical devices itself.

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#Overlay Network

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