Adding additional resources to help handle the extra load being experienced.

Adding additional resources to help handle the extra load being experienced.

• A. Open SDN
• B. Data Plane/Forwarding Plane
• C. Management Plane
• D. Horizontal Scaling

Answer: (D)

Horizontal scaling is about adding more resources to handle increased load by expanding across multiple machines. When demand grows, you spin up additional servers or containers and distribute traffic with a load balancer. This approach increases capacity and resilience because if one node falters, others keep serving requests, and you can keep adding nodes as needed. It’s a common pattern in cloud environments and works well with stateless services and auto-scaling.

The other options address different ideas: Open SDN relates to programming network control and behavior, not to increasing overall system capacity; the Data Plane/Forwarding Plane is about how devices actually move packets; the Management Plane covers control, configuration, and monitoring tasks. None of these directly describe adding resources to handle extra load the way horizontal scaling does.