6.2 Compare Traditional Networks with Controller-Based Networking 200-301 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   How do traditional networks typically handle a link or device failure?

   • AThe central controller recalculates paths and updates all devices.
   • BEach device independently converges using distributed protocols like OSPF and STP.
   • CThe network stops forwarding until an administrator manually fixes the issue.
   • DFailures are handled by a redundant controller that takes over.
   Reveal Solution Discussion Select an answer first
2. 27application · medium

   A network engineer is designing a new data center network and is considering a controller-based architecture. The engineer wants to ensure that if the controller fails, the network can still forward traffic for existing flows. Which design consideration is most important?

   • AThe controller should be placed in the data path so it can forward traffic if a switch fails.
   • BThe network should rely on STP to prevent loops during controller failure.
   • CAll switches should run OSPF as a fallback to maintain connectivity.
   • DSwitches should have flow tables that allow existing flows to continue forwarding without controller involvement.
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A network administrator needs to deploy a new VLAN configuration across 50 access switches. The administrator wants to minimize the risk of human error and ensure consistent configuration. Which approach is most aligned with controller-based networking principles?

   • AConfigure the VLAN on the core switch and rely on VTP to propagate it
   • BUse a script that logs into each switch and applies the configuration, but only on a subset of switches
   • CUse a configuration management tool that pushes the same VLAN configuration to all switches via APIs
   • DManually configure each switch via SSH using a standard template
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   A network team is evaluating whether to migrate from a traditional network to a controller-based network. They are concerned about the impact of a controller failure. What is a key consideration they should plan for?

   • AThe controller must be highly available, often with redundant controllers, to avoid a single point of failure
   • BThe network will immediately stop forwarding all traffic
   • CThe data plane will continue to operate without any impact
   • DThe network will automatically revert to traditional routing protocols
   Reveal Solution Discussion Select an answer first
6. 30expert · hard

   A service provider is comparing traditional and controller-based networks for scalability. They need to support a rapidly growing number of customer connections and frequent policy changes. Which factor is most likely to make controller-based networking more scalable than traditional networking?

   • ADistributed control plane allows each device to make independent decisions
   • BDistributed data plane requires more configuration
   • CCentralized data plane improves forwarding performance
   • DCentralized control plane reduces the need for per-device configuration
   Reveal Solution Discussion Select an answer first