試験高合格率保証2025年04月13日 JN0-223試験問題と正確な回答！ [Q40-Q57]

試験高合格率保証2025年04月13日 JN0-223試験問題と正確な回答！

テストエンジン練習問題JN0-223有効最新の問題集

質問 # 40
Which two statements about Junos automation are correct? (Choose two.)

A. The Junos REST API client is off-box.
B. The Junos REST API client is on-box.
C. Junos automation does not allow for device provisioning throuqh the console port.
D. Junos automation allows for device provisioning through the console port.

正解：B、D

解説：
* A. The Junos REST API client is on-box:The Junos REST API ison-box, meaning it is hosted directly on the Junos OS device. This allows you to interact with the device through RESTful API calls without needing an external client to act as an intermediary. With the on-box REST API, users can manage and automate configuration and operational tasks directly from the Junos device itself using HTTP/HTTPS protocols. This simplifies automation and remote management since the API server is embedded within the device.
Key Automation Capabilities of On-box REST API:
* Supports configuration, monitoring, and operational commands.
* Allows for direct device interaction via tools like curl, or through custom-built automation scripts.

質問 # 41
You are asked to develop an on-box Junos script that prevents deletion of the SNMP configuration.
Which type of script serves this purpose?

A. op script
B. commit script
C. event script
D. SNMP script

正解：B

解説：
A commit script in Junos is used to enforce policies and configuration constraints on the device. These scripts are written in Extensible Stylesheet Language Transformations (XSLT) or Python and are executed automatically during the commit process of a configuration change.
In this context, to prevent the deletion of the SNMP configuration, a commit script is the appropriate choice.
It can be designed to check the configuration changes being committed and reject any commit that attempts to delete or modify the SNMP configuration. This script essentially acts as a gatekeeper, ensuring that only allowable changes are committed to the device configuration.
Supporting References:
* Juniper Networks Commit Scripts Documentation:The official Juniper documentation provides examples and use cases of commit scripts, including how they can be used to prevent unauthorized changes to the device configuration.
* "Junos Automation Scripting"by Jonathan Looney: This resource gives practical examples and best practices for creating commit scripts to enforce configuration policies in Junos OS.

質問 # 42
Which statement is correct about the Junos XML API?

A. The API uses HTTPS for securing off-box automation.
B. The API is only executed when a configuration is committed
C. The API uses NETCONF for off-box automation.
D. The API only works for on-box automation tools.

正解：C

質問 # 43
What is the default port for NETCONF connections over SSH?

A. 0
B. 1
C. 2
D. 3

正解：D

解説：
https://www.juniper.net/documentation/us/en/software/junos/netconf/topics/topic-map/netconf- ssh-connection.html The IANA-assigned port for NETCONF-over-SSH sessions is 830.

質問 # 44
Which set of DevOps CAUMS values is correct?

A. Culture Automation, Lean, Measurement, and Sharing
B. Continuous, Assimilation, Learn, Morning, and Scientific
C. Coordinate, Acculturation. Lean, Mentoring, and Society
D. Control, Automation, Learn, Methodology, and Support

正解：D

質問 # 45
Which two statements are correct about a Python list data type? (Choose two.)

A. The data contained in a list data type is sequenced and indexed starting from 0.
B. The data contained in a list data type is not sequenced or indexed.
C. The data contained in a list data type can be modified.
D. The data contained in a list data type cannot be modified.

正解：A、C

解説：
Python lists have the following characteristics:
Modifiable Data (A): Lists are mutable, meaning you can change, add, or remove elements after the list has been created.
Sequenced and Indexed (B): Lists maintain the order of their elements and are indexed starting from 0. This means you can access elements by their position in the list.
Option C is incorrect because lists are mutable, allowing modifications. Option D is incorrect because lists are indeed sequenced and indexed, unlike dictionaries.
Reference:
Python Official Documentation: Covers the properties of lists, including mutability and indexing.
Python Data Structures Guide: Explains list operations and how to manipulate them.

質問 # 46
You are asked to write an on-box script that will be triggered when a specific interface on a Junos device goes down.
Which type of on-box script should you use to accomplish this task?

A. commit
B. SNMP
C. operation
D. event

正解：D

解説：
Aneventscript is used to automate responses to system events in Junos, such as an interface going down.
These scripts are triggered automatically when a specified event occurs, making them suitable for tasks like monitoring interface status and executing actions when the status changes.
* Option B (event)is correct because event scripts are designed for reacting to system events like an interface going down.
* Option A (commit)is used for configuration changes,Option C (operation)is used for operational tasks, andOption D (SNMP)is not applicable in this context.
Supporting References:
* Juniper Networks Event Scripts Documentation:Details how event scripts are used to automate responses to specific system events in Junos

質問 # 47
Which type of on-box automation script is designed to run every time a user executes a configuration change?

A. SNMP
B. operation
C. event
D. commit

正解：D

解説：
In Junos OS, a commit script is an on-box automation script that runs every time a configuration change is committed. Commit scripts are used to enforce configuration policies, validate configuration changes, or make automatic adjustments to configurations when certain conditions are met.
Commit Script (C): Executes automatically during the commit process, ensuring that the new configuration adheres to specific rules or conventions before it is applied to the system.
Event, SNMP, and operation scripts are used for other purposes in Junos automation but do not run automatically with every configuration change.
Reference:
Junos OS Automation Scripts Guide: Provides details on different types of scripts, including commit scripts, and their use cases.
Juniper Networks Documentation: Offers examples and best practices for creating and using commit scripts.

質問 # 48
A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)

A. GET
B. POST
C. HEAD
D. CONNECT

正解：A、B

解説：
REST APIs use HTTP methods to perform different operations on resources. In the context of RPC (Remote Procedure Call) requests:
GET: This method is used to retrieve data from the server. In a REST API, it is commonly used to fetch information about resources, such as the current configuration or operational state.
POST: This method is used to send data to the server to create or update a resource. In the context of RPC, POST is often used to execute a procedure on the server that may result in the modification of a resource or triggering of an action.
Options B (HEAD) and D (CONNECT) are not typically used for executing RPC requests:
HEAD is similar to GET but only retrieves the headers, not the body of the response.
CONNECT is used to establish a tunnel to the server, primarily for SSL-encrypted communication, and is not commonly associated with RESTful RPC operations.
Supporting Reference:
Juniper Networks REST API Documentation: The documentation provides detailed information about the use of HTTP methods in Juniper's RESTful services.
"RESTful Web Services" by Leonard Richardson and Sam Ruby: This book explains the principles of REST and how different HTTP methods, particularly GET and POST, are used to interact with RESTful APIs.

質問 # 49
Which statement is correct about DevOps?

A. DevOps is meant to define and restrict the development and operations tools used for a project.
B. DevOps is a defined standard written and maintained by the IEEE standards group.
C. DevOps is a collection of strict guidelines that promotes the project completion over all other aspects.
D. DevOps is meant to unite the development, operations, and other teams to improve project collaborations.

正解：D

解説：
DevOps is a set of practices, tools, and cultural philosophies that aims to integrate and automate the processes between software development and IT operations teams. The primary goal of DevOps is to shorten the systems development life cycle and provide continuous delivery with high software quality.
Option C is correct because DevOps fundamentally focuses on breaking down the silos between development and operations teams, fostering a collaborative environment where these teams work together throughout the entire software lifecycle. This collaboration extends to other stakeholders, including quality assurance (QA), security, and more, to ensure that the product is continuously delivered and improved based on real-time feedback.
DevOps promotes a cultural shift where teams are no longer isolated but work together to share responsibilities, which leads to increased efficiency, faster problem resolution, and a more streamlined deployment process. This culture of collaboration is supported by various automation tools and practices such as Continuous Integration (CI), Continuous Deployment (CD), Infrastructure as Code (IaC), and automated testing.
Supporting References:
* Juniper Networks Automation and DevOps Documentation:This documentation emphasizes the importance of collaboration between development and operations teams to streamline processes and improve efficiency, aligning perfectly with the principles of DevOps.
* "The DevOps Handbook"by Gene Kim, Patrick Debois, John Willis, and Jez Humble: This book provides an in-depth look into how DevOps practices enhance collaboration and lead to faster, more reliable software delivery.
* IEEE and Industry Standards:While DevOps practices are widely adopted, they are not defined or maintained by IEEE or any other formal standards body, which is why option D is incorrect.

質問 # 50
Which two statements are correct about using the Junos REST API? (Choose two.)

A. It must use SSH for a connection.
B. It supports data In CSV format.
C. It is a simple configuration.
D. NETCONF is not supported.

正解：B、C

解説：
* A. It supports data in CSV format:
The Junos REST API supports multiple data formats for transferring information between systems, including XML, JSON, and CSV (Comma Separated Values). This flexibility allows for easier data parsing, especially in environments where structured data (like CSV) is a standard. CSV is often used for bulk data export or import and reporting purposes, making it an essential format for automation tasks involving external systems or large datasets.
Example Usage in REST API:
When using the Junos REST API, a user can request configuration or operational data and specify the response format (XML, JSON, or CSV). CSV is particularly useful when integrating Junos devices with systems that require easily readable, tabular formats.
Reference:
* D. It is a simple configuration:
The Junos REST API is designed to be relatively simple to configure. Once the REST API service is enabled on the Junos device, it can be accessed via HTTP or HTTPS, making it an easy entry point for automation and management tasks. Unlike more complex protocols (such as NETCONF), the REST API is lightweight and easier to use for simple configuration changes and retrieving operational data.
Configuration Example:
To enable the REST API, you can add the following configuration:
set system services rest http
set system services rest https
After enabling the service, API requests can be made to interact with the device for automation tasks, without needing the complexity of SSH or NETCONF configuration.
Why the Other Options Are Incorrect:
B . It must use SSH for a connection: This is incorrect. The Junos REST API uses HTTP or HTTPS for communication, not SSH. While SSH is commonly used for NETCONF, it is not required for REST API connections. REST APIs operate over standard web protocols.
C . NETCONF is not supported: This is incorrect. Junos supports both REST API and NETCONF for automation and configuration management. NETCONF is an XML-based protocol used for device configuration, which operates over SSH. The REST API and NETCONF can coexist on the same device, offering multiple avenues for automation.
Juniper Automation in DevOps Context: The simplicity and flexibility of the Junos REST API make it ideal for DevOps automation tasks. It allows teams to easily interact with Junos devices using lightweight RESTful methods, integrating with external systems through formats like CSV. The ease of configuration supports rapid deployment and scaling of automated management tasks.
Reference from Juniper Documentation:
Junos REST API Documentation

質問 # 51
Which two statements are valid regarding Junos automation? (Choose two.)

A. The mod process handles XML API calls.
B. The jsd process handles XML API calls.
C. The jsd process handles JET API requests.
D. The mgd process handles JET API requests.

正解：B、C

解説：
In Junos automation, several processes handle API requests, and understanding which process handles what is crucial:
* jsd Process:
* XML API Calls (A): Thejsdprocess is responsible for handling XML API calls, which are a significant part of Junos automation. XML API allows for structured and standardized communication with Junos devices, enabling automation scripts to query and configure devices.
* JET API Requests (C): Thejsdprocess also handles JET (Junos Extension Toolkit) API requests.
JET provides a more modern, programmable interface for interacting with Junos OS, andjsdis the process that manages these interactions.
* mgd Process(Incorrect Option):
* Not for JET API Requests: Themgdprocess handles general management operations, such as CLI commands and managing the configuration database, but it does not handle JET API requests. That role is fulfilled byjsd.
* mod Process(Incorrect Option):
* Not for XML API Calls: Themodprocess deals with managing chassis components and is not involved in handling XML API calls.
* Juniper Networks JET and XML API Documentation: Describes the roles ofjsdin handling both XML and JET API requests.
* Junos Automation and DevOps Documentation: Provides insights into how different processes interact with Junos APIs.
References:

質問 # 52
As part of an application to manage network devices, you must query hundreds of network devices and return the unique set of IP prefixes by configured firewall filters. To accomplish this task you will require a mutable data type that contains unordered, unique elements.
Which Python data type will fulfill these requirements?

A. dictionaries
B. tuples
C. sets
D. lists

正解：C

解説：
https://stackoverflow.com/questions/14193438/are-python-sets-mutable/14193582

質問 # 53
What is the difference between a list and a tuple in Python?

A. Lists are mutable objects that use parentheses, and tuples are immutable objects that use square brackets.
B. Lists are immutable objects thatuse square brackets, and tuplesare mutable objects that use parentheses.
C. Lists are immutable objects that use parentheses, and tuples are immutable objects that use square brackets.
D. Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses.

正解：D

解説：
In Python, the distinction between lists and tuples is essential for efficient programming:
* Lists:
* Mutable (B): This means that once a list is created, its elements can be changed, added, or removed. Lists are versatile and commonly used when the data is expected to change.
* Square Brackets: Lists are defined using square brackets[].
Example:
my_list = [1, 2, 3]
my_list[0] = 10 # Modifying the first element
* Tuples:
* Immutable (B): Once a tuple is created, it cannot be altered. Tuples are used when a fixed collection of items is needed, providing more integrity to the data.
* Parentheses: Tuples are defined using parentheses().
Example:
my_tuple = (1, 2, 3)
# my_tuple[0] = 10 # This would raise an error because tuples are immutable
* Python Official Documentation: The Python Language Reference provides detailed information on data types like lists and tuples, including their mutability and syntax.
* Automation Scripts: In the context of automation, understanding when to use mutable or immutable data structures can significantly impact script performance and reliability.
References:

質問 # 54
What is the default port for NETCONF connections over SSH?

A. 0
B. 1
C. 2
D. 3

正解：D

解説：
https://www.juniper.net/documentation/us/en/software/junos/netconf/topics/topic-map/netconf-ssh-connection.
html
The IANA-assigned port for NETCONF-over-SSH sessions is 830.

質問 # 55
What are two popular methods of data serialization? (Choose two.)