6.2 Compare Traditional Networks with Controller-Based Networking 200-301 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A network engineer is evaluating the resilience of a controller-based network. The engineer is concerned about a single point of failure at the controller. Which design practice best mitigates this risk?

   • APlace the controller in the data path so it can forward traffic during failures.
   • BConfigure all switches to run OSPF as a backup to the controller.
   • CEnsure all switches have a full mesh of links so that traffic can bypass the controller.
   • DDeploy multiple controllers in a cluster to provide redundancy and high availability.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   How does controller-based networking improve operational efficiency compared to traditional networks?

   • AIt reduces the need for skilled network engineers.
   • BIt requires more manual configuration per device.
   • CIt allows network-wide changes to be made from a single point.
   • DIt eliminates the need for network monitoring.
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4. 13expert · hard

   A network engineer is designing a controller-based network for a financial trading platform where low latency is critical. The engineer is concerned that the controller might become a bottleneck for new flows. Which design approach best balances the need for low latency and the benefits of centralized control?

   • AUse traditional routing protocols like OSPF on the switches as a fallback to avoid controller dependency.
   • BUse proactive flow provisioning so that all expected flows are pre-installed in the switches, avoiding controller involvement for most packets.
   • CUse reactive flow provisioning so that the controller decides each new flow's path, ensuring optimal routing.
   • DPlace the controller in the data path to reduce the distance packets must travel.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   How does the data plane forward traffic in a traditional network?

   • AIt sends all traffic to the controller for a forwarding decision.
   • BIt forwards traffic based on flow tables installed by a central controller.
   • CIt uses a centralized forwarding table stored on a server.
   • DIt uses locally built forwarding tables derived from routing protocols and MAC learning.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A growing company expects to add hundreds of new devices to its network each month. The network team is small and wants to avoid manually configuring each device. Which network architecture characteristic is most beneficial for this scenario?

   • ACentralized control plane with automated provisioning and APIs
   • BDistributed data plane with centralized management only
   • CCentralized data plane with distributed control plane
   • DDistributed control plane with per-device configuration
   Reveal Solution Discussion Select an answer first