Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 748

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

Answer options

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

Correct answer: B

Explanation

The correct answer is B, as the overlay network in Cisco SD-Access is designed to provide network isolation and operate independently of the underlying physical infrastructure. Option A is incorrect because the overlay network does not rely on Layer 2 flooding, while option C mischaracterizes the overlay as using a traditional routed access design, which it does not. Option D is also wrong because the overlay is not merely a collection of physical devices but a virtualized layer that abstracts the physical network.