What is the purpose of a network fabric in a controller-based architecture?

To provide a single physical cable that connects all devices in the network.

To create a logical, interconnected topology that delivers consistent network services across all devices.

To replace the need for any routing protocols in the network.

To encrypt all data traffic between endpoints automatically.

A network engineer is designing a hybrid SDN deployment where some switches are OpenFlow-enabled and others are legacy. The controller must manage both types. The engineer needs to ensure that the legacy switches can still be managed by the controller. Which approach should the engineer take?

Use OpenFlow as the southbound API for all switches, including legacy ones.

Use the northbound API to manage legacy switches.

Use NETCONF as the southbound API for legacy switches and OpenFlow for OpenFlow-enabled switches.

Replace all legacy switches with OpenFlow-enabled switches.

A network engineer is integrating an SDN controller with a cloud management platform. The platform needs to retrieve real-time network statistics and also provision new network segments. The engineer is concerned about the performance impact of frequent API calls. Which approach minimizes the impact?

Use REST API for both provisioning and statistics retrieval, but poll statistics less frequently.

Use SNMP for statistics retrieval and REST for provisioning.

Use a single REST API call to retrieve all statistics and provision all segments at once.

Use NETCONF for statistics retrieval and REST for provisioning.

A network engineer is troubleshooting a performance issue in an SDN environment. The engineer suspects that the data plane is being overwhelmed by control plane traffic. Which action would help isolate the issue?

Check the southbound API connection between the controller and switches.

Check the overlay encapsulation type.

Check the underlay routing protocol configuration.

Check the northbound API connection between the controller and applications.

A network architect is designing an SDN solution for a financial institution that requires high availability. The architect is considering using multiple controllers in a cluster. Which factor is most important to ensure that the control plane remains available and consistent?

The controllers must synchronize their state and use a consensus protocol to maintain consistency.

The controllers must have a direct connection to every network device.

The controllers must use the same southbound API protocol to communicate with devices.

The controllers must be placed in the same data center to reduce latency.

CiscoCertified Network Associate (CCNA)

Domain 6Objective 3

6.3 Describe Controller-Based, Software Defined Architecture (overlay, Underlay, and Fabric) 200-301 Practice Questions (Page 5)

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 21–25

21foundation · easy
What is the purpose of a network fabric in a controller-based architecture?
Select an answer first
22expert · hard
A network engineer is designing a hybrid SDN deployment where some switches are OpenFlow-enabled and others are legacy. The controller must manage both types. The engineer needs to ensure that the legacy switches can still be managed by the controller. Which approach should the engineer take?
Select an answer first
23expert · hard
A network engineer is integrating an SDN controller with a cloud management platform. The platform needs to retrieve real-time network statistics and also provision new network segments. The engineer is concerned about the performance impact of frequent API calls. Which approach minimizes the impact?
Select an answer first
24application · medium
A network engineer is troubleshooting a performance issue in an SDN environment. The engineer suspects that the data plane is being overwhelmed by control plane traffic. Which action would help isolate the issue?
Select an answer first
25expert · hard
A network architect is designing an SDN solution for a financial institution that requires high availability. The architect is considering using multiple controllers in a cluster. Which factor is most important to ensure that the control plane remains available and consistent?
Select an answer first

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