In a controller-based network, which protocol is least likely to be moved to a centralized controller?

In a controller-based network, which protocol is least likely to be moved to a centralized controller?

• A. OSPF
• B. BGP
• C. SSH
• D. EIGRP

Answer: (C)

In a controller-based network, the controller takes over the decision-making for routing and traffic forwarding by centralizing the control plane. Routing protocols like OSPF, EIGRP, and BGP are designed to share topology and reachability information between devices, so moving that logic to the controller fits the idea of a centralized control plane. The controller computes optimal paths and programs forwarding rules into the devices. SSH, however, is a secure management protocol used to access and administer individual devices. It’s not involved in how traffic is forwarded or how routes are chosen. Centralizing SSH would create a single point of admin access to all devices and complicate authentication, auditing, and reliability for device management. Because its purpose is management rather than routing, SSH is the least likely to be moved to a centralized controller.

In a controller-based network, the controller takes over the decision-making for routing and traffic forwarding by centralizing the control plane. Routing protocols like OSPF, EIGRP, and BGP are designed to share topology and reachability information between devices, so moving that logic to the controller fits the idea of a centralized control plane. The controller computes optimal paths and programs forwarding rules into the devices.

SSH, however, is a secure management protocol used to access and administer individual devices. It’s not involved in how traffic is forwarded or how routes are chosen. Centralizing SSH would create a single point of admin access to all devices and complicate authentication, auditing, and reliability for device management. Because its purpose is management rather than routing, SSH is the least likely to be moved to a centralized controller.