3. Describe the Use and Roles of Network Simulation and Test Tools (such as Cisco Modeling Labs and pyATS) 200-901 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   What is the primary purpose of network simulation tools in the network development lifecycle?

   • ATo replace physical hardware in all production environments
   • BTo automate the configuration of network devices in production
   • CTo validate network designs and test configurations before deployment
   • DTo capture and analyze live network traffic
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2. 27application · easy

   A network automation team is evaluating pyATS to replace a collection of ad-hoc scripts that manually SSH to devices and parse command output. The team wants a framework that provides structured test results and reusable test cases. Which benefit of pyATS directly addresses this need?

   • AIt provides a standardized test case structure and reporting mechanism.
   • BIt automatically generates network configurations from YAML files.
   • CIt replaces the need for any Python programming.
   • DIt provides a GUI for building network topologies.
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4. 28application · easy

   A network automation engineer is tasked with creating a regression test suite for a set of network devices. The engineer wants to use pyATS to run the same set of tests every time a configuration change is made. What is the primary role of pyATS in this scenario?

   • ATo simulate the network topology for testing purposes.
   • BTo automatically fix configuration errors found during testing.
   • CTo provide a framework for writing and executing automated tests that validate device behavior.
   • DTo generate network traffic for performance testing.
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5. 29expert · hard

   A network team uses CML to simulate a complex multi-site topology. They want to run a pyATS regression suite against the CML environment every time a developer pushes a change to the network automation repository. The team has limited CI/CD runner resources and wants to minimize the time the CML lab is occupied. Which approach best balances these constraints?

   • AKeep a persistent CML lab running and trigger a pyATS job that connects to the existing lab nodes.
   • BUse pyATS to simulate the network topology directly, eliminating the need for CML.
   • CRun the pyATS tests against a physical lab instead of CML to avoid CML resource usage.
   • DStart the CML lab on demand, run the pyATS job, then stop the lab after tests complete.
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6. 30foundation · easy

   In pyATS, how are tests organized for execution?

   • AAs modules that are imported into a single main script
   • BAs test cases that are grouped into jobs
   • CAs scripts that run independently without any grouping
   • DAs playbooks that contain multiple tasks
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