11. Interpret Basic YANG Models 200-901 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A network team is designing a configuration management system that must support both transactional changes (all-or-nothing) and the ability to retrieve the current operational state of interfaces. The team is considering using NETCONF with YANG. Which combination of NETCONF capabilities best meets these requirements?

   • AUse the running datastore and the <edit-config> operation for changes, and the <get-config> operation for state.
   • BUse the startup datastore and the <copy-config> operation for changes, and the <get> operation for state.
   • CUse the candidate datastore and the <edit-config> operation for changes, and the <get-config> operation for state.
   • DUse the candidate configuration datastore and the <commit> operation for transactional changes, and the <get> operation for operational state.
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2. 17application · medium

   A network team is deciding between using SNMP and YANG/NETCONF for a new configuration management system. They need to support transactional configuration changes and rollback on failure. Which approach is more appropriate?

   • AYANG/NETCONF, because NETCONF supports datastores and the 'candidate' capability, enabling transactional changes and rollback.
   • BSNMP, because it supports the 'candidate' datastore.
   • CSNMP, because it is widely supported and lightweight.
   • DYANG/NETCONF, because it is easier to parse than SNMP.
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4. 18application · medium

   A network team is comparing SNMP and NETCONF/YANG for automating configuration changes across a large fleet of routers. The team needs to ensure that configuration changes are validated before being applied and that the device can roll back to a previous configuration if needed. Which approach is more suitable?

   • ANETCONF with YANG, because it supports validation and rollback capabilities.
   • BSNMP, because it has built-in validation and rollback.
   • CRESTCONF without YANG, because it provides native rollback.
   • DCLI scripting, because it is the only way to perform rollback.
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5. 19application · medium

   A network administrator needs to remove a specific static route from a router using RESTCONF. The YANG module defines a list named 'route' under a container 'routing' with key 'prefix'. The administrator wants to delete the route with prefix '192.0.2.0/24'. Which HTTP method and URI should be used?

   • APUT /restconf/data/routing/route=192.0.2.0%2F24
   • BDELETE /restconf/data/routing/route=192.0.2.0%2F24
   • CGET /restconf/data/routing/route=192.0.2.0%2F24
   • DPOST /restconf/data/routing/route
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6. 20application · medium

   A network automation engineer is integrating a new device that supports a YANG module from a different vendor. The module defines a container named 'system' with a leaf 'hostname'. The engineer's existing scripts already use a different module that also defines a container named 'system'. How can the engineer avoid naming conflicts when using both modules in the same NETCONF session?

   • AUse a different NETCONF session for each module.
   • BRename the container in one of the modules.
   • CUse CLI commands instead of NETCONF to avoid the conflict.
   • DUse the namespace URIs to distinguish the data nodes from each module.
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