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Juniper JN0-224 Exam Syllabus Topics:

Topic
Details

Topic 1

Data Serialization: This domain addresses YAML and JSON formats used for structured data representation and exchange in network automation workflows.

Topic 2

Junos Automation Stack and DevOps Concepts: This domain covers fundamental automation tools, frameworks, APIs, and DevOps culture applicable to Junos platform operations and network management.

Topic 3

Python
PyEZ: This domain examines Python programming with PyEZ library for Junos automation, including JSNAPy, Jinja2 templates, RPC calls, exception handling, and device configuration management.

Topic 4

NETCONF
XML API: This domain focuses on XML syntax, XPath expressions, NETCONF protocol, and XML API functionality for programmatic device configuration and communication.

Topic 5

Rest API: This domain covers Junos REST API implementation, REST API Explorer tool, and cURL usage for HTTP-based device management and configuration.

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Juniper Automation and DevOps, Associate (JNCIA-DevOps) Sample Questions (Q17-Q22):

NEW QUESTION # 17
Which type of on-box automation script is designed to run every time a user executes a configuration change?

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

Answer: D

Explanation:
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.

NEW QUESTION # 18
Exhibit.

Referring to the exhibit, which XML XPath expression will only show the IP address XML elements?

A. //address/name
B. //name
C. /address/name
D. /name

Answer: A

Explanation:
https://www.w3schools.com/xml/xpath_syntax.asp

NEW QUESTION # 19
Which two statements about NETCONF are correct? (Choose two.)

A. The default port for NETCONF is port 930.
B. NETCONF cannot use the default SSH port.
C. NETCONF can use the default SSH port.
D. The default port for NETCONF is port 830.

Answer: C,D

Explanation:
NETCONF (Network Configuration Protocol) is used for network device management and can operate over SSH. The following are true about NETCONF:
Default Port 830 (B): By default, NETCONF uses port 830 for communication over SSH. This is the standard port reserved for NETCONF sessions.
Use of Default SSH Port (D): NETCONF can also operate over the standard SSH port (port 22) if configured to do so. This allows flexibility in network management scenarios where port 830 might not be available or used.
Options A and C are incorrect because they refer to incorrect or non-applicable port numbers for NETCONF.
Reference:
IETF RFC 6241: Specifies the use of NETCONF over SSH, including port details.
Juniper Networks NETCONF Documentation: Discusses the configuration and operation of NETCONF on Junos devices, including port usage.

NEW QUESTION # 20
Which two programming languages are used for Junos on-box scripting? (Choose two.)

A. Perl
B. SLAX
C. XSLT
D. Ruby

Answer: B,C

Explanation:
Junos on-box scripting supports the following programming languages:
SLAX (C): SLAX (Structured Language for XML) is a scripting language designed specifically for Junos devices. It allows for easy manipulation of XML data, making it ideal for creating Junos scripts that interact with device configurations.
XSLT (D): XSLT (Extensible Stylesheet Language Transformations) is another language used for transforming XML documents into other formats. It is commonly used in Junos for transforming XML data into different views or outputs.
Options A (Perl) and B (Ruby) are not used for Junos on-box scripting. While these languages are popular in other contexts, Junos scripting relies heavily on XML-based languages like SLAX and XSLT.
Reference:
Junos XML API and Scripting Guide: Describes the use of SLAX and XSLT for on-box scripting.
Juniper Networks Automation Documentation: Provides examples and best practices for using SLAX and XSLT in Junos scripting.

NEW QUESTION # 21
Which two statements about NETCONF are true? (Choose two.)

A. It uses the messages layer to lock the configuration of a Junos device.
B. It uses the operations layer to lock the configuration of a Junos device.
C. It uses the messages layer to commit the configuration of a Junos device.
D. It uses the operations layer to commit the configuration of a Junos device.

Answer: B,D

Explanation:
NETCONF (Network Configuration Protocol) operates through different layers, with the operations layer being particularly important for managing configurations:
Operations Layer (A & D): This layer is responsible for actions like locking and committing the configuration on a Junos device. The lock operation prevents other sessions from modifying the configuration, and the commit operation applies the configuration changes to the device.
Options B and C are incorrect because the messages layer handles the communication aspects, such as exchanging data between the client and server, not performing configuration operations like locking and committing.
Reference:
IETF RFC 6241 (NETCONF): Describes the protocol layers and their functions, with a focus on the operations layer.
Juniper Networks NETCONF Documentation: Provides insights into how NETCONF operations are managed in Junos

NEW QUESTION # 22
......

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