An enterprise is implementing a software-defined fabric to support multi-tenant traffic isolation. The underlay is a routed IP network. The overlay uses VXLAN to encapsulate tenant traffic. Which statement correctly describes the role of the underlay in this design?

The underlay replaces the need for a fabric controller by providing direct data-plane forwarding.

The underlay must be a Layer 2 network to support VXLAN encapsulation.

The underlay provides the physical or logical IP connectivity that carries encapsulated overlay traffic between fabric edge devices.

The underlay is responsible for learning tenant MAC addresses and enforcing tenant-specific policies.

A data center operator is designing a fabric to support both traditional VLAN-based workloads and modern containerized workloads that require IP-based connectivity. The operator wants to minimize changes to the physical underlay. Which approach best meets this requirement?

Deploy a VXLAN overlay that supports both Layer 2 and Layer 3 virtual networks over the existing IP underlay.

Deploy a separate physical network for containerized workloads.

Replace the underlay with a new MPLS network.

Use only traditional VLANs and extend them across the data center.

A network engineer is deploying a controller-based architecture for a campus network. The goal is to centralize policy decisions while allowing switches to forward traffic at line rate. The engineer plans to use an overlay network to carry tenant traffic. Which design choice best aligns with the goal of separating the control plane from the data plane?

Configure the overlay network to carry control traffic between switches and the controller.

Keep the routing protocol on each switch and use the controller only for monitoring.

Replace all switches with routers that run BGP to exchange tenant routes.

Use the controller to compute forwarding paths and push flow entries to switches via a southbound API.

CiscoCertified Network Associate (CCNA)

Domain 6Objective 3

6.3 Describe Controller-Based, Software Defined Architecture (overlay, Underlay, and Fabric) 200-301 Practice Questions (Page 4)

Part of the Automation and Programmability domain, which accounts for 10% of the 200-301 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~5–8 in this domain), expect 1–1 from this objective — we provide 37 practice questions to prepare you well beyond it. (estimate)

37questions here

8free pages

4concepts

10%of the exam

Questions 16–20

16foundation · easy
Which of the following is a common southbound protocol used by an SDN controller to communicate with network devices?
Select an answer first
17application · medium
An enterprise is implementing a software-defined fabric to support multi-tenant traffic isolation. The underlay is a routed IP network. The overlay uses VXLAN to encapsulate tenant traffic. Which statement correctly describes the role of the underlay in this design?
Select an answer first
18expert · hard
A data center operator is designing a fabric to support both traditional VLAN-based workloads and modern containerized workloads that require IP-based connectivity. The operator wants to minimize changes to the physical underlay. Which approach best meets this requirement?
Select an answer first
19application · medium
A network engineer is deploying a controller-based architecture for a campus network. The goal is to centralize policy decisions while allowing switches to forward traffic at line rate. The engineer plans to use an overlay network to carry tenant traffic. Which design choice best aligns with the goal of separating the control plane from the data plane?
Select an answer first
20foundation · easy
Which of the following is an example of a northbound API in a controller-based network?
Select an answer first

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6.3 Describe Controller-Based, Software Defined Architecture (overlay, Underlay, and Fabric) 200-301 Practice Questions (Page 4)

Questions 16–20

Which of the following is a common southbound protocol used by an SDN controller to communicate with network devices?

An enterprise is implementing a software-defined fabric to support multi-tenant traffic isolation. The underlay is a routed IP network. The overlay uses VXLAN to encapsulate tenant traffic. Which statement correctly describes the role of the underlay in this design?

A data center operator is designing a fabric to support both traditional VLAN-based workloads and modern containerized workloads that require IP-based connectivity. The operator wants to minimize changes to the physical underlay. Which approach best meets this requirement?

Which of the following is an example of a northbound API in a controller-based network?

Keep studying — Automation and Programmability