JN0-224 100% Guarantee Download JN0-224 Exam PDF Q&A [May 04, 2026]
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NEW QUESTION # 37
You want to perform a dry run on the myPlays playbook and use a custom inventory file called myRouters.ini.
Which Ansible command would you use in this scenario?
- A. ansible-playbook myPlays -limit myRouters
- B. ansible-playbook myPlays -extra-vars "inventory_file=myRouters .ini"
- C. ansible-playbook myPlays -extra-vars "dry run=True" myRouters.ini
- D. ansible-playbook myPlays --check -i myRouters.ini
Answer: B
NEW QUESTION # 38
You are using the curl tool to include multiple RPCs in a REST API request.
Which HTTP method must be used for this request?
- A. POST
- B. GET
- C. PUT
- D. HEAD
Answer: A
NEW QUESTION # 39
Which HTTP status code indicates a response to a successful request?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Explanation
Reference: https://www.juniper.net/documentation/en_US/junos-space-sdk/13.1/apiref/ com.juniper.junos_space.sdk.help/html/reference/Commonbehav.html
NEW QUESTION # 40
Which data construct is used to guarantee that element names and data values remain unique in an XML document?
- A. dictionary
- B. namespace
- C. schema definition
- D. element
Answer: B
Explanation:
In XML documents, a namespace is the data construct used to ensure that element names and data values remain unique. Namespaces prevent naming conflicts by differentiating between elements or attributes that may have the same name but different meanings. This is particularly important in XML, where documents often incorporate elements from multiple sources.
Detailed Explanation:
XML Namespaces: A namespace is a collection of names, identified by a URI reference, which is used to distinguish between elements that may have identical names but different definitions or origins. This helps avoid ambiguity in the document.
How Namespaces Work: When a namespace is applied, each element or attribute in the XML document is associated with a prefix. This prefix, combined with the namespace URI, ensures that the element or attribute is uniquely identified, even if another element or attribute in the same document has the same local name but a different namespace.
Schema Definition vs. Namespace: Although an XML schema definition (XSD) can define the structure and type constraints of an XML document, it does not guarantee uniqueness of element names across different XML documents. That role is fulfilled by namespaces.
Practical Example:
xml
Copy code
<root xmlns:ns1="http://www.example.com/ns1"
xmlns:ns2="http://www.example.com/ns2">
<ns1:item>Item in namespace 1</ns1:item>
<ns2:item>Item in namespace 2</ns2:item>
</root>
In this example, the item elements are in different namespaces (ns1 and ns2), which keeps them unique even though they have the same name.
Reference:
Juniper Automation and DevOps Documentation: These practices highlight the importance of namespaces in XML documents to maintain the integrity and uniqueness of data, which is essential in automation scripts and configuration files.
W3C XML Namespace Specification: The World Wide Web Consortium (W3C) standard for XML Namespaces defines how namespaces should be used to avoid name conflicts.
Namespaces are a crucial concept in XML, ensuring that data can be consistently managed and interpreted correctly, particularly in complex systems where multiple XML documents or schemas are involved.
NEW QUESTION # 41
Which process is responsible for XML automation requests?
- A. jsrpd
- B. jsd
- C. rpd
- D. mgd
Answer: D
Explanation:
The mgd (Management Daemon) process in Junos is responsible for handling XML automation requests. This daemon manages the configuration and operational commands received via NETCONF, which uses XML for data exchange. The mgd process parses the XML data and applies the necessary configuration or retrieves the requested information.
Option B is correct because mgd is the process that handles XML-based requests in Junos.
Options A (jsrpd), C (rpd), and D (jsd) are incorrect because they are responsible for different functions, such as routing protocols and services, not XML automation.
Supporting Reference:
Juniper Networks Management Daemon (mgd) Documentation: Provides an overview of the responsibilities of the mgd process, including handling XML requests.
NEW QUESTION # 42
Which two statements about Junos automation are correct? (Choose two.)
- A. Junos automation does not allow for device provisioning throuqh the console port.
- B. The Junos REST API client is on-box.
- C. The Junos REST API client is off-box.
- D. Junos automation allows for device provisioning through the console port.
Answer: B,D
Explanation:
A). The Junos REST API client is on-box:
The Junos REST API is on-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.
Reference:
C . Junos automation allows for device provisioning through the console port:
Junos automation does indeed allow for device provisioning through the console port, especially in the context of Zero Touch Provisioning (ZTP). When network interfaces are not initially configured, or when remote access is not possible, devices can be provisioned via the console port. This method is commonly used during the initial setup process, enabling administrators to deploy configurations even without network access. ZTP automates initial configurations, including system setup and software installation, which can be triggered via the console.
Key Advantages of Console-based Provisioning:
Useful in environments where network interfaces are unavailable or not yet configured.
Essential for the initial bootstrapping of devices in remote locations.
Why the Other Options Are Incorrect:
B . Junos automation does not allow for device provisioning through the console port: This statement is incorrect because Junos automation does allow for provisioning via the console port, particularly during initial device setups.
D . The Junos REST API client is off-box: This is incorrect because the REST API client can be directly on the Junos device, providing local API functionality (on-box).
Juniper Automation in DevOps Context: Junos automation, especially with on-box REST API and console-based provisioning, enhances the flexibility and accessibility of device management in DevOps environments. These capabilities simplify remote configuration, monitoring, and device setup even in cases where direct network access is unavailable.
NEW QUESTION # 43
Which statement about the NETCONF content layer is true?
- A. It uses XML for RPC request and response payloads.
- B. It uses HTML for RPC request and response payloads.
- C. It uses YAML for RPC request and response payloads.
- D. It uses JSON for RPC request and response payloads.
Answer: A
Explanation:
The NETCONF protocol, used for network management, utilizes XML for encoding the RPC (Remote Procedure Call) requests and responses. XML is chosen because of its flexibility and ability to represent hierarchical data structures, making it well-suited for representing network configurations and states.
Option B is correct because XML is the standard format used for NETCONF RPC payloads.
Options A (YAML), C (JSON), and D (HTML) are incorrect because these formats are not used by NETCONF for its RPC payloads.
Supporting Reference:
RFC 6241 - NETCONF Protocol: This RFC describes the use of XML for encoding NETCONF messages.
NEW QUESTION # 44
What are two Junos PyEZ configuration object methods? (Choose two.)
- A. lockO
- B. commie ()
- C. config ()
- D. device ()
Answer: A,C
Explanation:
In Junos PyEZ, the Config object provides various methods for interacting with device configurations. Two of the key methods are:
lock(): This method locks the candidate configuration database to prevent other users or processes from making changes while you are modifying the configuration.
config(): This method is used to create a Config object that represents the configuration database, allowing you to load, modify, and commit configuration changes.
Option C (lock) and Option D (config) are correct because they are valid methods provided by the PyEZ Config object.
Option A (commie) and Option B (device) are incorrect as they are not methods of the Config object.
Supporting Reference:
Junos PyEZ Documentation: Details the methods available in the Config object, including lock() and config().
NEW QUESTION # 45
Which two tools would you use to make REST API requests? (Choose two.)
- A. NETCOfJF
- B. cURL
- C. Web browser
- D. SSH
Answer: B,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.
NEW QUESTION # 46
Which statement about the NETCONF content layer is true?
- A. It uses XML for RPC request and response payloads.
- B. It uses HTML for RPC request and response payloads.
- C. It uses YAML for RPC request and response payloads.
- D. It uses JSON for RPC request and response payloads.
Answer: A
NEW QUESTION # 47
Which process is responsible for JET automation requests?
- A. jsrpd
- B. rpd
- C. jsd
- D. mgd
Answer: C
Explanation:
The jsd (Junos Script Daemon) process is responsible for handling JET (Junos Extension Toolkit) automation requests. The JET framework allows for more programmable interactions with Junos devices, using APIs to manage and automate network functions. The jsd process handles these API requests, executes the relevant scripts, and interacts with the Junos configuration and operational states accordingly.
JET enables developers to write applications that interact with the Junos OS through APIs, providing a powerful tool for network automation, monitoring, and configuration management. The jsd process ensures that all JET-related operations are processed and executed properly.
Why the Other Options Are Incorrect:
A . jsrpd: This is not a process associated with JET automation requests.
B . mgd: The mgd process is responsible for handling management tasks like CLI commands and configuration changes but is not directly responsible for JET automation requests.
C . rpd: The rpd (Routing Protocol Daemon) manages routing protocols like BGP and OSPF but has no involvement in JET automation.
Reference from Juniper Documentation:
Juniper's documentation on JET and the jsd process outlines how this daemon manages script and API request processing for automation tasks.
NEW QUESTION # 48
Which two statements about the REST API are correct? (Choose two.)
- A. The REST API application is stateless.
- B. The TCP session state is maintained by the server.
- C. The TCP session state is maintained by the client
- D. The REST API application is stateful.
Answer: A,C
Explanation:
REST (Representational State Transfer) is an architectural style for designing networked applications, and its key principles include:
Statelessness (B): Each request from the client to the server must contain all the information needed to understand and process the request. The server does not store any session state between requests, meaning each request is independent and does not rely on previous ones.
TCP Session State (C): While REST itself is stateless, the underlying TCP connection's state, such as keeping the connection alive or managing retries, is handled by the client. The server does not retain information about the TCP connection beyond the processing of the individual request.
Options A and D are incorrect because they imply that the REST API is stateful, which contradicts the stateless nature of REST.
Reference:
REST API Design Principles: Describes the stateless nature of REST and the responsibility of clients in managing session state.
Web Development Documentation: Discusses how REST APIs operate, focusing on statelessness and client-server interaction.
NEW QUESTION # 49
Why is a REST API considered stateless?
- A. The client requests to the server do not include state information.
- B. No client context is stored on the server between requests.
- C. The state of the server is not important when making requests.
- D. The REST API is an international API.
Answer: A
NEW QUESTION # 50
Which feature is used in XML to ensure that all attributes and elements have unique names?
- A. XPath
- B. selectors
- C. namespace
- D. predicate
Answer: A
NEW QUESTION # 51
Which two statements are correct about the Junos REST API Explorer? (Choose two.)
- A. The REST API Explorer returns data only in XML format.
- B. The REST API Explorer is enabled by default on all Junos devices.
- C. The REST API Explorer supports multiple RPC calls.
- D. The REST API Explorer supports both GET and POST calls.
Answer: C,D
Explanation:
The Junos REST API Explorer provides an interactive environment to explore and execute REST API calls. The correct statements are:
Supports GET and POST Calls (C): The REST API Explorer allows users to make both GET and POST requests, enabling retrieval and submission of data to the Junos device.
Supports Multiple RPC Calls (D): The REST API Explorer can execute multiple RPC (Remote Procedure Call) commands, allowing a wide range of operations to be performed directly through the interface.
Option A is incorrect because the REST API Explorer is not enabled by default; it must be enabled manually. Option B is incorrect because the REST API Explorer returns data in both XML and JSON formats, not just XML.
Reference:
Junos REST API Explorer Documentation: Provides details on the supported operations and how to use the Explorer for different types of requests.
Juniper Networks Documentation: Covers the setup and usage of the REST API Explorer.
NEW QUESTION # 52
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