5.3 Describe the Role of Network Services Orchestration (NSO) 350-501 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A service provider is planning to deploy NSO to automate service provisioning. The team wants to ensure that NSO can integrate with their existing OSS/BSS systems, which use REST APIs. They also want to provide a self-service portal for customers. Which NSO feature is essential for this integration?

   • AThe CLI interface
   • BThe SNMP interface
   • CThe RESTCONF northbound interface
   • DThe NETCONF northbound interface
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2. 2expert · hard

   A service provider is integrating NSO with an existing CI/CD pipeline. The pipeline uses Ansible to configure servers and now wants to also manage network services. The team is considering two approaches: (1) have Ansible call NSO's RESTCONF API to trigger service changes, or (2) have Ansible directly configure network devices using its own modules. Which approach is more aligned with NSO's role?

   • AUse Ansible to directly configure devices, as it is already in the pipeline.
   • BUse Ansible to call NSO's RESTCONF API to manage services, letting NSO handle device-specific configurations.
   • CUse both approaches in parallel, with Ansible managing some devices and NSO managing others.
   • DReplace Ansible with NSO's built-in automation features.
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4. 3expert · hard

   A service provider is deploying NSO in a multi-tenant environment where different customers have different service requirements. The team wants to ensure that service instances for one customer cannot affect another customer's services. What is the best way to achieve this isolation in NSO?

   • AUse separate NSO instances for each customer.
   • BImplement custom Python code in the service logic to check for conflicts.
   • CUse NSO's built-in support for service instance isolation through the CDB and service models.
   • DUse YANG models with customer-specific namespaces and access control lists (ACLs).
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5. 4application · medium

   A network engineer is designing a new service in NSO for a point-to-point Ethernet circuit. The service must support different encapsulation types (e.g., QinQ, VLAN) and different bandwidths. The engineer wants to ensure that the service model enforces that only valid combinations of encapsulation and bandwidth are allowed. What is the best way to implement this validation in NSO?

   • AWrite a Python script that runs after the service is created to check the configuration.
   • BUse YANG constraints, such as 'when' and 'must' statements, in the service model.
   • CUse the CDB to enforce validation rules.
   • DImplement the validation in the network element driver (NED).
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6. 5foundation · easy

   What is the primary role of Network Services Orchestration (NSO) in a service provider environment?

   • ATo act as a firewall and security gateway for the service provider's core network
   • BTo serve as a high-performance data plane forwarding engine for customer traffic
   • CTo provide a centralized platform for automating the delivery and lifecycle management of network services across multi-vendor devices
   • DTo replace the need for any network monitoring or analytics tools
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