Question 1

Which of the following statements about the NSP Workflow Manager (WFM) application is FALSE?

Accepted Answer

B

Explanation: The Nokia NSP Workflow Manager (WFM) is a powerful automation tool designed for modern, large-scale networks. A key architectural feature is its ability to handle multiple concurrent operations to ensure scalability and efficiency. The WFM engine can execute multiple, independent workflow instances simultaneously. Limiting execution to a single workflow at a time would create a significant performance bottleneck, rendering the tool ineffective for managing the complex and parallel tasks required in carrier-grade network environments. Therefore, the statement that only one workflow can be executed at a time is false.

Question 2

Which of the following statements about the YANG data modeling language is FALSE?

Accepted Answer

C

Explanation: The statement that a YANG data model is not human-readable is false. YANG (Yet Another Next Generation) is specifically designed with a human-readable syntax, which is often compared to C-style programming languages. It uses indentation, curly braces, and clear keywords (like container, leaf, list) to define a hierarchical data structure. This readability is a key feature, allowing network engineers and developers to easily understand, create, and manage the data models for network devices. The other statements accurately describe core features of the YANG language.

Question 3

Which of the following statements about the NSP Workflow Manager is FALSE?

Accepted Answer

B

Explanation: The NSP Workflow Manager is built upon the OpenStack Mistral workflow service, which is specifically designed for creating and managing workflows. OpenStack Heat, in contrast, is an orchestration engine used to manage the lifecycle of cloud infrastructure resources, such as servers, networks, and storage. While both are OpenStack projects, the NSP Workflow Manager leverages Mistral for its core workflow engine capabilities, not Heat.

Question 4

What part of the YANG modules' tree structure are containers considered as?

Accepted Answer

B

Explanation: In the YANG data modeling language, the data is structured as a hierarchical tree. A container node is used to group related data nodes together. It does not have a value itself but contains other nodes (child nodes), which can be leaves, lists, or other containers. This function of grouping and containing other nodes makes it an interior node in the tree, which is conceptually equivalent to a "branch". The branches create the hierarchical structure of the data model.

Question 5

Which of the following is NOT an advantage of Software-Defined Networks (SDN) over traditional networks?

Accepted Answer

C

Explanation: The fundamental architectural principle of Software-Defined Networking (SDN) is the separation (or decoupling) of the control plane from the data plane. In SDN, network intelligence is logically centralized in a software-based controller (the control plane), which is separated from the underlying forwarding devices (the data plane). An integrated control and data plane, where each network device independently runs its own control logic, is the defining characteristic of traditional, non-SDN networks. Therefore, an integrated control plane is not an advantage of SDN; it is the legacy architecture that SDN is designed to replace.

Question 6

Which of the following statements about Nokia's Network Services Platform (NSP) Model-driven Mediation (MDM) framework is FALSE?

Accepted Answer

D

Explanation: The Nokia NSP Model-driven Mediation (MDM) framework is a component that translates NSP's abstract service models into device-specific configurations. It is fundamentally based on YANG data models and uses the NETCONF protocol for communication, confirming statements A and B. A primary function of this mediation is to provide an abstracted view of the network element to the NSP, making statement C correct. However, the framework is not vendor-agnostic. It requires specific mediation logic (drivers/adapters) tailored to each vendor's device type and software version to handle differences in YANG model implementation and device behavior. Therefore, the claim of being "vendor agnostic" is false.

Question 7

Which of the following is NOT supported by the Workflow Manager out of the box?

Accepted Answer

C

Explanation: The Nokia Network Services Platform (NSP) Workflow Manager (WFM) is an engine for automating network operations. Out of the box, it is equipped with a suite of adapters and tasks designed specifically for network device and service interaction. These include native support for REST/RESTCONF APIs, CLI command execution on Nokia (SROS) and third-party devices, and TL1 for optical equipment integration. Executing arbitrary shell commands on a server's operating system is considered a general-purpose IT automation task, not a core network management function. While this capability can be added by developing a custom Java task (a "bean"), it is not provided as a standard, pre-packaged feature within the Workflow Manager.

Question 8

Which of the following best describes intent-based networking?

Accepted Answer

C

Explanation: Intent-Based Networking (IBN) is a closed-loop approach to network automation. The core principle involves translating high-level business or operational goals ("intent") into a required network configuration or "desired state." The IBN system then continuously monitors the network's "actual state" and compares it against this desired state. If any deviation or drift is detected, the system automatically takes corrective actions (remediation) to bring the network back into compliance with the original intent. This continuous validation and assurance loop is the fundamental characteristic of IBN.

Question 9

Which input is optional when using the std.ssh action to access a remote server?

Accepted Answer

A

Explanation: The std.ssh action is designed to execute a command on a remote server via SSH. However, a common use case in automation workflows is to first verify connectivity and credentials before proceeding with subsequent tasks. The std.ssh action supports this by allowing it to be called without a cmd input. In this mode, the action simply establishes a connection, authenticates, and then disconnects. A successful execution validates the host, username, and password/privatekey. Therefore, the cmd parameter is considered optional.

Question 10

Which of the following allows the Intent Manger to communicate with network elements being managed by SNMP?

Accepted Answer

D

Explanation: The Nokia Network Services Platform (NSP) uses a mediation layer to communicate with network elements. The Intent Manager, a high-level component of NSP, relies on this layer to translate its abstract intents into device-specific commands. For network elements that are managed using traditional protocols like SNMP and do not have a specific model-driven adapter, the Generic Mediator is used. This mediator provides the necessary framework to discover, monitor, and perform basic configuration on third-party or legacy devices using SNMP MIBs, effectively bridging the gap between the modern intent-based system and classic network management protocols.

Question 11

Which of the following HTTP methods are NOT supported in REST and RESTCONF?

Accepted Answer

D

Explanation: REST (Representational State Transfer) and the RESTCONF protocol (RFC 8040) utilize a standard set of HTTP methods to perform CRUD (Create, Read, Update, Delete) operations on managed resources. The supported methods include GET (to retrieve data), PUT (to create or replace a resource), POST (to create a resource), DELETE (to remove a resource), and PATCH (to partially update a resource). The method 'ADD' is not a standard HTTP method defined in the relevant IETF RFCs (such as RFC 7231 or RFC 5789 for PATCH) and is therefore not supported by REST or RESTCONF. Operations that might be conceptually described as "adding" are handled by the standard POST or PUT methods.

Question 12

Which of the following is NOT a characteristic of Containers?

Accepted Answer

C

Explanation: Containers are designed based on the principle of immutability. A container image is a static, unchangeable file that includes everything needed to run an application. This design ensures that containers are predictable and repeatable, behaving identically across different environments. They are also self-contained, packaging the application with all its dependencies. The concept of being "ever-changing" directly contradicts the core tenet of immutability, where updates are handled by replacing an existing container with a new one built from an updated image, rather than modifying a running container.

Question 13

Which of the following configures the network based on input provided by the user?

Accepted Answer

A

Explanation: In the context of Intent-Based Networking (IBN), an "intent" is a high-level, declarative statement provided by a user or application that describes a desired service outcome or network state. The network management system, such as the Nokia Network Services Platform (NSP), interprets this intent and automatically translates it into the specific, low-level device configurations required to achieve the desired state. The user specifies "what" they want (the intent), and the system determines "how" to implement it, abstracting away the complexity of the underlying network configuration.

Question 14

"The automated configuration, coordination, and management of large virtualized systems, middleware, and services" describes which of the following?

Accepted Answer

B

Explanation: An orchestrator is a system responsible for the automated arrangement, coordination, and management of complex computer systems and services. In the context of virtualization and cloud computing, it automates the entire lifecycle of services, including provisioning virtual machines, configuring networks, deploying applications, and scaling resources across large, distributed environments. This high-level, workflow-based automation perfectly matches the description of managing large virtualized systems, middleware, and services.

Question 15

Which feature can be used to make a workflow portableif the workflow needs to be executed on either a development or production lab)?

Accepted Answer

B

Explanation: The "Environments" feature is specifically designed to ensure workflow portability. It allows for the abstraction of environment-specific configurations, such as IP addresses, credentials, and other parameters, from the core workflow logic. By defining separate environments for "development" and "production," the same workflow can be executed in either lab without modification. The workflow references abstract variable names, and the selected environment provides the concrete values for those variables at runtime, making the workflow reusable and portable.

Free Nokia 4A0-AI1 Actual Exam Questions