JN0-223 Exam Questions and Answers | Exam-Dumps (Page: 2)

QUESTION: 6

Junos supports which two APIs for on-box scripting? (Choose two.)

JET
Puppet
XML
Chef

Answer(s): A,C

Explanation:

Juniper Networks' Junos operating system supports several APIs for on-box scripting, two of which are:

JET (Juniper Extension Toolkit): JET is a modern API framework that provides a programmable interface for interacting with Junos. It allows developers to create custom applications that run directly on Junos devices, enabling the automation of network operations. JET provides both a gRPC and a REST API interface, allowing for flexible integration with external systems.

XML API: The Junos XML API allows direct interaction with the Junos OS through XML-based requests. This API can be used to retrieve information, configure devices, and execute commands on Junos devices. The XML API is crucial for automation tasks as it provides a structured and consistent way to interact with the device's configuration and operational data.

Detailed Explanation is:
JET (A) provides high-performance access to Junos routing, switching, and service elements via programmable interfaces. It is highly used for creating custom applications that require tight integration with the Junos OS.

XML (C), on the other hand, is a well-established method for interacting with Junos, especially for legacy systems or when working within environments where XML is the standard data format.

Other options like Puppet (B) and Chef (D) are not APIs provided by Junos for on-box scripting but are configuration management tools used externally to manage Junos devices.

Reference:

Juniper Networks JET Documentation: Provides details on how to leverage JET APIs for automation.

Junos XML Management Protocol Guide: Describes how to use XML for scripting and automating tasks in Junos.

These APIs are key components of Juniper's automation strategy, allowing for scalable, flexible, and efficient network operations.

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QUESTION: 7

Which two statements about NETCONF layers are correct? (Choose two.)

NETCONF layers use the messages layer to receive RPCs from a remote NETCONF server.
NETCONF layers use the messages layer to send RPCs to a remote NETCONF server.
NETCONF layers use the operations layer to receive RPCs from a remote NETCONF server.
NETCONF layers use the operations layer to send RPCs to a remote NETCONF server.

Answer(s): B,C

Explanation:

NETCONF (Network Configuration Protocol) is a standard protocol defined for managing network devices. NETCONF operates in a layered architecture, which includes the following key layers:

Operations Layer: This layer deals with the actual operations like <get-config>, <edit-config>, <copy- config>, and others. It receives RPC (Remote Procedure Call) requests from a remote NETCONF client and processes these requests.

Messages Layer: This layer is responsible for encoding the RPCs and sending them over the network. It handles the communication between the NETCONF client and server, ensuring that the RPC messages are correctly formatted (usually in XML) and transmitted.

Statement B is correct because the Messages layer is responsible for sending RPCs to a remote NETCONF server.

Statement C is correct because the Operations layer is where the NETCONF server receives and processes the RPCs sent by the client.

Supporting

Reference:

Juniper Networks NETCONF Documentation: Provides a detailed breakdown of the NETCONF protocol layers and their functions.

RFC 6241: The official specification for NETCONF, which describes the layered architecture, including the operations and messages layers.

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QUESTION: 8

Which two tools would you use to make REST API requests? (Choose two.)

cURL
NETCOfJF
Web browser
SSH

Answer(s): A,C

Explanation:

REST API requests can be made using various tools that support HTTP methods. Two common tools are:

cURL: A command-line tool that allows you to send HTTP requests, including GET, POST, PUT, and DELETE. It is widely used for testing and interacting with RESTful APIs due to its simplicity and flexibility.

Web Browser: Modern web browsers can be used to send HTTP GET requests directly by entering the URL into the address bar. Additionally, browser extensions like Postman or built-in developer tools can be used to construct and send more complex REST API requests.

Option B (NETCOfJF) is incorrect as it does not refer to a standard tool for making REST API requests.

Option D (SSH) is incorrect because SSH is a protocol used for secure remote login and command execution, not for sending REST API requests.

Supporting

Reference:

cURL Documentation: Official cURL documentation provides extensive information on how to use cURL to interact with REST APIs.

Web Development and REST API Guides: Many web development resources and REST API documentation recommend using web browsers and tools like cURL for testing and interacting with APIs.

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QUESTION: 9

Which DevOps "Three way" principle addresses technical debt?

feedback
flow
continuous experimentation and learning
continuous experimentation

Answer(s): B

Explanation:

The "Three Ways" in DevOps represent key principles for achieving continuous delivery and improvement. They are:

Flow (First Way): This principle focuses on creating a fast flow of work from development to operations, reducing delays, and minimizing handoffs. It addresses technical debt by emphasizing the importance of reducing complexity, minimizing work-in-progress (WIP), and ensuring that code and infrastructure are simple and maintainable.

Feedback (Second Way): This involves creating a feedback loop that allows teams to detect and correct issues quickly.

Continuous Experimentation and Learning (Third Way): Encourages a culture of continuous experimentation, learning from failures, and innovation.

The Flow principle specifically addresses technical debt by promoting practices that prevent the accumulation of unnecessary complexity and encouraging early detection and resolution of problems, thus ensuring that the codebase and infrastructure remain maintainable and scalable.

Supporting

Reference:

"The Phoenix Project" by Gene Kim, Kevin Behr, and George Spafford: A foundational text in DevOps literature, explaining the Three Ways and how they relate to improving IT and software development processes.

"The DevOps Handbook" by Gene Kim et al.: Expands on the Three Ways, particularly the importance of flow in preventing technical debt and ensuring a smooth deployment pipeline.

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QUESTION: 10

Which two processes are used by Junos automation? (Choose two.)

mod
jsd
ifd
kmd

Answer(s): B,C

Explanation:

In Junos OS, automation processes are integral to the system's ability to manage network operations efficiently. The following processes are used by Junos automation:

jsd (Junos XML API Server Daemon): This process is crucial for handling XML API requests, which are essential for automation tasks. The jsd process manages interactions between the Junos XML API and the Junos OS, enabling automation scripts to query and configure network devices using XML- formatted commands.

ifd (Interface Daemon): While ifd is primarily responsible for managing network interfaces, it is involved in automation through its role in the operational state of the network. Automation scripts often need to interact with network interfaces to retrieve status information or modify configurations, making ifd a critical component.

Other options like mod and kmd are not directly related to the primary automation processes in Junos OS. mod is related to chassis management, and kmd handles security services.

Reference:

Juniper Networks Automation and DevOps Documentation: Provides detailed descriptions of processes like jsd and ifd and their roles in Junos OS.

Junos OS Daemons Documentation: Outlines the purpose and functionality of various daemons, including jsd and ifd.

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Juniper JN0-223 Exam (page: 2) Juniper Automation and DevOps, Associate Updated on: 25-Dec-2025

QUESTION: 6

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QUESTION: 7

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QUESTION: 8

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QUESTION: 9

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QUESTION: 10

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Juniper JN0-223 Exam (page: 2)
Juniper Automation and DevOps, Associate
Updated on: 25-Dec-2025