5.3 Describe the Role of Network Services Orchestration (NSO) 350-501 Practice Questions (Page 6)

Questions 26–28

1. 26application · medium

   A service provider needs to automate the deployment of a new MPLS VPN service across thousands of PE routers from multiple vendors. The team wants a single system that can model the service, translate it into device-specific configurations, and push those configurations using each device's native management protocol. Which solution best meets this requirement?

   • AUse Cisco NSO with YANG service models and network element drivers to provision the service across all PE routers.
   • BUse a generic configuration management tool that only supports SSH and expects identical device configurations.
   • CDeploy a Python script that uses NETCONF to push the same configuration to every PE router.
   • DConfigure each PE router individually using the vendor's CLI to ensure accuracy.
   Reveal Solution Discussion Select an answer first
2. 27expert · hard

   A service provider is using NSO to manage a service that spans multiple devices. During a service modification, one device fails to accept the new configuration. What happens to the overall service modification in NSO?

   • AThe service manager automatically retries the failed device until it succeeds.
   • BThe modification is applied to the devices that succeeded, and the failed device is marked for retry.
   • CThe modification is aborted, but the service instance is updated in the CDB to reflect the attempted change.
   • DThe entire modification is rolled back, and the service remains in its previous state.
   Reveal Solution Discussion Select an answer first
3. 28application · medium

   A service provider uses NSO to manage a mix of Cisco IOS XR and Juniper Junos devices. The team wants to integrate NSO with an existing Python-based automation framework that currently uses RESTCONF to interact with devices. How can NSO be integrated into this framework?

   • AHave the framework continue to use RESTCONF directly to devices, and use NSO only for reporting.
   • BReplace the framework's RESTCONF calls with NSO's NETCONF interface.
   • CUse NSO's CLI to configure devices and then export the configs to the framework.
   • DUse NSO's RESTCONF interface to manage services and devices, while NSO handles the underlying device-specific protocols.
   Reveal Solution Discussion Select an answer first