6.2 Compare Traditional Networks with Controller-Based Networking 200-301 Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   In a controller-based network, what is the role of the controller in relation to the control plane?

   • AIt acts as a backup for the distributed control plane running on each device.
   • BIt replaces the data plane on each device.
   • CIt only monitors the network and does not influence forwarding decisions.
   • DIt makes forwarding decisions and installs flow entries or forwarding rules on devices.
   Reveal Solution Discussion Select an answer first
2. 32foundation · easy

   What is a benefit of the programmable interfaces provided by controller-based networking?

   • AThey eliminate the need for any network protocols.
   • BThey require each device to be configured individually.
   • CThey allow network devices to be configured using only the command-line interface.
   • DThey enable automation and integration with external systems via APIs.
   Reveal Solution Discussion Select an answer first
4. 33application · medium

   In a controller-based network, a packet arrives at a switch that does not have a matching flow entry. The switch sends the packet to the controller for a forwarding decision. Which statement best describes the data plane behavior in this scenario?

   • AThe data plane floods the packet out all ports except the incoming port, and the controller learns the destination from the response.
   • BThe data plane makes the forwarding decision locally using its routing table and then informs the controller.
   • CThe data plane drops the packet and sends an alert to the controller, which then updates the routing table.
   • DThe data plane forwards the packet based on the flow entry installed by the controller after the first packet is processed.
   Reveal Solution Discussion Select an answer first
5. 34foundation · easy

   What is a common management method in controller-based networking?

   • AUsing a CLI on the controller to configure all devices at once.
   • BUsing SNMP to manually set each device's configuration.
   • CUsing SSH to configure each device individually.
   • DUsing REST APIs or NETCONF to programmatically configure devices.
   Reveal Solution Discussion Select an answer first
6. 35foundation · easy

   Which statement describes a key characteristic of controller-based networking?

   • AEach network device independently runs routing protocols to make forwarding decisions.
   • BConfiguration changes are applied manually on each device using CLI.
   • CThe data plane is removed from network devices and placed in the controller.
   • DThe control plane is centralized, and devices receive forwarding instructions from a controller.
   Reveal Solution Discussion Select an answer first