Nokia 4A0-AI1 Nokia NSP IP Network Automation Professional Exam Practice Test

According to the Mistral Workflow Language (v2) website1, a workflow definition consists of several attributes that define its properties and behavior. The common workflow attributes are: name, description, type, input, output and vars1.

According to the Nokia NSP Workflow Manager Application Help2, Workflow Manager has the following characteristics:

• It provides several building tools to design and create new workflows. You can use graphical editors, text editors, or import existing workflows from files or repositories.
• It uses Openstack Mistral as the core workflow engine. Mistral is an open source project that provides a service for managing workflows across multiple cloud platforms.
• It supports scheduling of workflow executions. You can use cron expressions or triggers to specify when and how often a workflow should run.
• It supports parallel execution of many workflows. You can run multiple workflows simultaneously on different network elements or services.

Therefore, based on these sources, the correct answer is:

B. It uses Openstack Heat as the core workflow engine.

This is FALSE because Workflow Manager uses Openstack Mistral, not Heat, as the core workflow engine. Heat is another open source project that provides a service for orchestrating multiple cloud applications using templates.

The other statements are TRUE because:

• A. It provides several building tools to design and create new workflows. This allows you to create workflows that suit your specific network needs and preferences.
• C. It supports scheduling of workflow executions. This allows you to automate recurring network tasks and optimize network performance and availability.
• D. It supports parallel execution of many workflows. This allows you to handle complex network scenarios and operations efficiently and effectively.

 the NSP REST Gateway API provides the entry point for API clients to locate and authenticate REST client requests to gain access to the various NSP modules that have registered API services. 

According to the Nokia NSP Workflow Design and Management course12, a workflow is a sequence of tasks that are executed to achieve a certain goal. Data flow in a workflow refers to passing data between tasks12. Therefore, the correct answer is B.

Data flow can be defined using input, output, and publish parameters in a workflow definition3. Input parameters are used to pass data into a workflow, output parameters are used to return data from a workflow, and publish parameters are used to share data between tasks within a workflow3.

The statement that best describes the Intent Manager application is: "It generates and validates the configuration of the network." Intent Manager is responsible for collecting the user's intent, verifying the user's input, and converting the user's intent into a device-specific configuration. It uses a high-level language to abstract the network complexity, enabling the network operator to define intent in simple terms. Once the intent is defined, Intent Manager automatically generates a device-specific configuration for each network element. It then validates the intent by checking the network's current state against the user's desired intent. If there is a mismatch, it will take corrective action to bring the network to the desired intent state.

Model-Driven Mediation (MDM) is a component that provides mediation between model-driven NSP applications and Nokia or third-party network devices. It uses adaptors to convert NSP application requests to device specific directives using standard protocols such as NETCONF, SNMP and CLI over SSH or Telnet.

This statement is false because MDM can communicate with devices that only support CLI (Command Line Interface) using a translation module that converts CLI commands to NETCONF or RESTCONF protocols. MDM acts as a mediator between the northbound system and the southbound devices by translating device configuration to a standard format that can be consumed by the northbound system.

The other statements are true:

B. It is the foundation for supporting multi-vendor device management. C. It provides the translation between the AMI and device model. D. It can interface with devices that support OpenConfig gRPC Network Management Interface.

An integrated control plane and data plane is NOT an advantage of Software-Defined Networks (SDN) over traditional networks. SDN separates the control plane from the data plane, enabling more efficient and flexible network management. By centralizing the network logic at the controller level, applications can communicate directly with the controller, allowing for greater agility in automating, monitoring, and provisioning network infrastructure.

some of the advantages of Software-Defined Networks (SDN) over traditional networks are:

• Traffic programmability
• Agility
• Policy-driven network supervision
• Network automation
• Centralized controller operations
• Decoupling of control plane from data plane
• Global view of network’s state

The main sections of an abstract YANG module file are arguments and statements.

An argument is a string that provides additional information about a statement. A statement is a keyword followed by an argument and optionally enclosed by braces ({ }) containing substatements.

For example, an abstract YANG module file could start with:

module ibn-intent { namespace “urn:nokia.com:ibn:intent”; prefix ibn;

This defines the module name, namespace and prefix as arguments for the module, namespace and prefix statements respectively.

Virtualization is not a characteristic of intent-based networking, but rather a technology that enables it. Virtualization is the process of creating virtual versions of physical resources, such as servers, storage, or networks1. Virtualization allows for more flexibility and scalability in network design and management, but does not imply any automation or intelligence.

According to the Nokia NSP Programmable Network Automation website1, NSP API documentation and downloadable sample codes are available on the Nokia Network Developer Portal. The NSP Workflow Manager allows the design and management of workflows to automate network operations using Mistral DSL v2 which is based on YAML2. YAML definesexpressions in workflow and action definitions. The formatting of the YAML must comply with Mistral DSL v2 specifications3

NSP APIs allow for supervision of network elements, help with the definition and activation of network services, and allow for an OSS and NSP server to talk to each other. However, they do not support GraphQL, which is a query language for APIs. 

According to Nokia NSP IP Network Automation Professional guide, NSP APIs support REST/RESTCONF, SOAP/XML and GraphQlll, and help with the definition and activation of network services, and they also allow for supervision of network elements and an OSS and NSP server to talk to each other. Therefore, statement B is false as it states that NSP APIs support Kafka which is not mentioned in the guide as a supported API.

REST and RESTCONF APIs provide a single entry point into the consolidated suite of NSP applications. Another source2 mentions that NSP REST gateway provides access to NSD and NRC functionalities through REST API services. A third source3 explains that RESTCONF is an HTTP-based protocol that performs CRUD operations on data using YANG models.