Certified Information Systems Security Professional (CISSP) Practice Exam

The networking concept that separates the control plane from the data plane in a router is Software-Defined Networking (SDN). In traditional networking, both the control plane, which is responsible for routing decisions and management, and the data plane, which handles the actual forwarding of packets, are typically integrated within the same device. SDN changes this architecture by allowing the control plane to be centralized and decoupled from the data plane.

In SDN, the control plane is managed by a centralized controller that communicates directives to multiple devices within the network. This allows for more dynamic and flexible network management, enabling features such as automated configuration, provisioning, and real-time adjustments to network behavior based on demand or policy changes. The data plane remains on the networking devices, responsible for the actual packet forwarding based on the rules set by the control plane.

The other concepts listed, such as Time-Sensitive Networking (TSN), Multiprotocol Label Switching (MPLS), and Virtual Local Area Networks (VLANs), do not focus on separating these two planes. TSN is primarily concerned with providing deterministic network performance for time-sensitive applications, MPLS is about speeding up the flow of network traffic and ensuring efficient routing, while VLANs are utilized to segment networks logically