3. Describe the Use and Roles of Network Simulation and Test Tools (such as Cisco Modeling Labs and pyATS) 200-901 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   In Cisco Modeling Labs (CML), what is the purpose of the topology builder?

   • ATo generate configuration files for physical devices
   • BTo manage user authentication and access control
   • CTo capture and analyze packets flowing through the virtual network
   • DTo create and connect virtual network devices in a graphical canvas
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2. 22foundation · easy

   What is a benefit of using pyATS with CML for network testing?

   • AIt automatically fixes configuration errors found during testing
   • BIt eliminates the need for any physical network hardware
   • CIt provides real-time traffic analysis of the production network
   • DIt allows testing of configurations in a safe, virtual environment without affecting production
   Reveal Solution Discussion Select an answer first
4. 23expert · hard

   A network automation team has a pyATS test suite with multiple testcases. They want to run only a subset of testcases in a CI pipeline when a change affects only BGP-related configurations. The team wants to avoid running the full suite to save time. What is the most appropriate way to achieve this?

   • ACreate a separate job file that includes only the BGP-related testcases.
   • BRun the full suite but use pyATS's built-in reporting to filter results.
   • CModify each testcase to skip itself if BGP is not affected.
   • DUse a single job file that runs all testcases but with a global skip flag.
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5. 24foundation · easy

   What is the role of a test job in pyATS?

   • ATo group and execute a set of test cases
   • BTo define the testbed and device credentials
   • CTo generate HTML reports
   • DTo parse the output of commands
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6. 25application · medium

   A network team wants to use Cisco Modeling Labs (CML) to test a new OSPF design that includes a mix of IOSv, IOS XE, and CSR1000v nodes. They also want to run a pyATS job that executes the same test suite against the virtual topology every night. What must the team ensure to make this repeatable?

   • AUse only IOSv nodes in CML because pyATS does not support IOS XE or CSR1000v.
   • BManually reconfigure the CML topology each night before running the pyATS job because CML does not save topologies.
   • CExport the CML topology as a reusable lab file and ensure the pyATS testbed file references the same node names and IP addresses that CML assigns.
   • DRun the pyATS job from inside CML's built-in terminal because pyATS cannot connect to CML nodes over the network.
   Reveal Solution Discussion Select an answer first