Drag and Drop Question Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right. Answer:

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Explanation

This question tests knowledge of the core components of Cisco SD-WAN architecture and their specific functions, requiring the test-taker to match functional descriptions to the correct component.

Approach. The correct interaction involves dragging each description from the left column to its corresponding Cisco SD-WAN component in the right column, based on the component's primary function:

1. 'distributes routes and policy information via OMP' should be dragged to 'Cisco vSmart Controller'. The vSmart controller is the centralized control plane in Cisco SD-WAN, responsible for advertising routes and policy information to the WAN Edge routers using the Overlay Management Protocol (OMP).

2. 'enables the communication of devices that sit behind NAT' should be dragged to 'Cisco vBond Orchestrator'. The vBond orchestrator is the initial point of contact for all SD-WAN devices, facilitating secure connectivity and NAT traversal for WAN Edge routers and controllers to establish their control and data plane connections.

3. 'enables centralized provisioning and simplifies network changes' should be dragged to 'Cisco vManage'. The vManage controller is the centralized management plane, providing a graphical user interface (GUI) for configuration, monitoring, troubleshooting, and overall network operations, thus enabling centralized provisioning and simplifying network changes.

4. 'is responsible for traffic forwarding, security, encryption, QoS, and routing protocols' should be dragged to 'Cisco WAN Edge router'. The WAN Edge router is the data plane component, deployed at branch offices or data centers. It handles the actual forwarding of user traffic, implements security policies (like IPsec encryption), provides QoS, and participates in routing protocols at the network edge.

Common mistakes.

• common_mistake. Common mistakes typically arise from confusing the distinct roles of the four core Cisco SD-WAN components:

• Confusing vSmart (control plane) with vManage (management plane): A common error is associating 'distributes routes and policy information' with vManage. While vManage allows you to configure policies, it is vSmart that distributes and enforces these policies through OMP on the control plane. vManage is for 'provisioning and simplifying network changes' through its management interface.

• Misattributing NAT traversal to vSmart or vManage: The critical role of enabling communication for devices behind NAT is specific to the vBond orchestrator's function in onboarding and establishing initial trust. Other controllers do not perform this role.

• Assigning data plane functions to controllers: Functions like 'traffic forwarding, security, encryption, and QoS' are distinctly the responsibility of the WAN Edge routers, which are the physical or virtual devices at the network perimeter handling actual data movement. Controllers (vSmart, vManage, vBond) manage, control, and orchestrate, but do not directly forward user traffic.

Concept tested. Cisco SD-WAN architecture and the distinct functions of its core components: vManage (management plane), vSmart (control plane), vBond (orchestration plane), and WAN Edge routers (data plane).

Reference. https://www.cisco.com/c/en/us/products/routers/what-is-sd-wan.html

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