1. Describe the Value of Model Driven Programmability for Infrastructure Automation 200-901 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   What is the role of YANG in model-driven programmability?

   • AIt is a type of database used to store network configuration.
   • BIt is a scripting language used to automate network tasks.
   • CIt is a protocol used to transfer configuration data between devices.
   • DIt is a data modeling language used to define the structure of configuration and state data.
   Reveal Solution Discussion Select an answer first
2. 27application · medium

   A large enterprise is automating the deployment of new branch-office routers. They want to ensure that every router is configured identically, with no manual deviations, and that the automation can be reused as the network grows. Which characteristic of model-driven programmability is most directly responsible for achieving this?

   • AIt automatically discovers all devices on the network without any configuration
   • BIt replaces the need for any network monitoring or logging
   • CIt uses standardized data models that describe the desired configuration independently of the device's CLI
   • DIt provides a graphical web interface for configuring devices
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A service provider must roll out a new QoS policy to 1,000 routers. The team has a short maintenance window and cannot afford to have any device left with a partial configuration. They also need to verify that the policy was applied correctly on every device. Which combination of features makes model-driven programmability the best choice over CLI scripting?

   • ATransactional configuration and state retrieval
   • BFaster CLI parsing and screen scraping
   • CAutomatic IP address assignment
   • DHigher bandwidth and lower latency
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   A network team must periodically verify that all routers have the correct NTP server configured and that no unauthorized changes have been made. They want to automate this audit across the network. Which model-driven programmability use case is most appropriate?

   • ADevice discovery using LLDP
   • BTraffic engineering using MPLS
   • CConfiguration management and compliance checking
   • DNetwork telemetry for interface statistics
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A service provider must verify that all customer edge routers conform to a baseline configuration (e.g., correct NTP servers, logging settings, and ACLs). The team currently logs into each device and runs show commands, which is time-consuming and error-prone. They want a scalable way to audit hundreds of devices and generate a compliance report. Which approach is most effective?

   • AManually review a sample of devices each quarter
   • BCreate a script that SSHes to each device and runs show running-config, then stores the output in a file
   • CUse model-driven programmability to retrieve operational state via YANG models and compare against the baseline
   • DUse SNMP to poll interface counters and infer compliance from traffic patterns
   Reveal Solution Discussion Select an answer first