2.4 Automation/orchestration Design, Integration, and On-Going Support for Networks (such as Interfacing with APIs, Model-Driven Management, Controller-Based Technologies, and Evolution to CI/CD Framework) 400-007 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A network team is supporting a CI/CD pipeline for network automation. They have noticed that a recent change to a YANG model caused some automation scripts to fail. What is the most effective way to prevent this issue in the future?

   • AImplement a regression testing suite that runs automation scripts against a test environment with the updated YANG model before deployment.
   • BRely on the vendor's release notes to identify any breaking changes in the YANG model.
   • CDisable the CI/CD pipeline and make all changes manually to avoid automation failures.
   • DPin the YANG model version in the automation scripts and do not upgrade until all scripts are updated.
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2. 2application · medium

   A university is deploying a controller-based network for its campus. The design must support both wired and wireless access, and the controller must provide a single policy framework for both. Which controller-based architecture is most suitable?

   • AA wireless controller that also manages wired switches through a proprietary protocol.
   • BSeparate controllers for wired and wireless, with policies defined independently in each.
   • CA traditional network with no controller, using manual configuration for both wired and wireless.
   • DA unified controller that manages both wired and wireless access points, with a common policy engine.
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4. 3expert · hard

   A large enterprise is designing an automation workflow to manage network changes across multiple business units. Each business unit has its own change management process and approval chain. The workflow must integrate with these existing processes while providing a unified automation platform. Which design approach is most effective?

   • AA separate automation platform for each business unit, with no integration between them.
   • BA centralized automation platform that enforces a single, standardized change management process for all business units.
   • CA federated automation platform that integrates with each business unit's existing change management system via APIs, while providing a common automation engine.
   • DA manual process where each business unit submits change requests via email, and the network team implements them.
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5. 4application · medium

   A cloud provider is designing an automation solution to manage virtual network functions (VNFs) in a multi-tenant environment. The solution must allow tenants to programmatically configure their own virtual networks, but the provider must enforce resource limits and isolation between tenants. Which design approach best meets these requirements?

   • AUse a controller-based architecture with a northbound REST API for tenants and a southbound interface to network devices, with policy enforcement at the controller.
   • BExpose a RESTful API to tenants that directly configures the underlying network devices, with no additional abstraction layer.
   • CCreate a separate management network for each tenant and let them use their own automation tools.
   • DProvide tenants with direct SSH access to the VNFs so they can configure them as needed.
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6. 5application · medium

   A network operations team is implementing model-driven telemetry to monitor interface utilization and errors across a fleet of routers. They need to ensure that the telemetry data is structured, consistent, and can be consumed by their existing analytics platform. Which approach should they use?

   • AUse periodic CLI scraping to collect 'show interface' output and store it in a text file for manual review.
   • BConfigure SNMP traps on each router and send them to the analytics platform via a syslog collector.
   • CEnable gRPC-based telemetry with YANG models on the routers, streaming data to a collector that forwards it to the analytics platform.
   • DDeploy a proprietary vendor API on each router and write custom parsers for each vendor's output format.
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