3. Describe the Use and Roles of Network Simulation and Test Tools (such as Cisco Modeling Labs and pyATS) 200-901 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A network engineer is building a CML topology that includes a mix of IOSv and IOS XE nodes. The engineer needs to run a pyATS test that requires specific interface naming conventions. The engineer notices that the interface names in CML do not match the expected names in the pyATS testbed. What is the most efficient way to resolve this?

   • AUse a different CML node type that has the expected interface names.
   • BUpdate the pyATS testbed file to use the interface names as they appear in CML.
   • CRun the pyATS test without interface names and rely on IP addresses only.
   • DModify the CML node configuration to change the interface names to match the testbed.
   Reveal Solution Discussion Select an answer first
2. 17expert · hard

   A network team is planning to migrate from a physical lab to a virtual simulation environment to reduce costs and increase flexibility. They need to ensure that the virtual environment can support automated testing and can be integrated into their existing CI/CD pipeline. They also need to maintain the ability to test with different IOS versions. Which solution best meets these requirements?

   • ADeploy CML with multiple IOS images and use pyATS for automated testing, integrating the CML API into the CI/CD pipeline.
   • BUse a physical lab with a few devices and rely on manual testing.
   • CUse pyATS alone to simulate the network and run tests.
   • DUse CML only for simulation and manually run tests.
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4. 18foundation · easy

   What is pyATS?

   • AA network simulation tool for building virtual topologies
   • BA configuration management tool for automating device configs
   • CA Python-based test automation framework for network devices
   • DA network monitoring protocol for collecting device metrics
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5. 19application · medium

   A network engineer wants to use pyATS to verify that all routers in a lab have the same OSPF configuration. The engineer has a testbed file with device credentials. What is the first step the engineer should take to write the test?

   • ACreate a testcase that connects to each device and runs a parser to collect OSPF configuration.
   • BUse the testbed file to directly modify the OSPF configuration on each device.
   • CRun a pyATS job that automatically generates the OSPF configuration.
   • DUse CML to build the topology and then manually verify OSPF.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A network engineer is evaluating Cisco Modeling Labs (CML) to create a realistic test environment for a new routing protocol implementation. The team needs to include a mix of IOSv, IOS XE, and a virtual switch, and they must be able to save and reuse the topology. Which CML feature set directly supports these requirements?

   • AIntegration with external authentication and role-based access control.
   • BNode types, image management, and topology building/saving.
   • CBuilt-in configuration compliance checks and automated rollback.
   • DAuto-discovery of physical devices and real-time traffic generation.
   Reveal Solution Discussion Select an answer first