What is the advantage of separating the control plane from the data plane in SDN?

Separating the control plane (which makes decisions about where traffic goes) from the data plane (which forwards the actual traffic) in Software-Defined Networking (SDN) centralizes network intelligence. This centralization simplifies management and configuration, leading to a decrease in overall network complexity. Instead of configuring each network device individually, a central controller manages the entire network's forwarding behavior. "Limits data queries to the control plane" is incorrect because the control plane is for decision-making, not data queries. "Reduces cost" can be a benefit of SDN, but it's a consequence of simplified management and automation, not the direct advantage of plane separation itself. "Offloads virtual machine creation to the data plane" is incorrect; VM creation is typically handled by hypervisors and orchestration layers, not the data plane.