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Free JN0-223 Exam Braindumps (page: 3)

Page 2 of 13
PDF with 66 Questions

YAML uses which two data structures? (Choose two.)

  1. arrays
  2. mappings
  3. sequences
  4. objects

Answer(s): B,C

Explanation:

YAML (YAML Ain't Markup Language) primarily uses two data structures:

Mappings: These are key-value pairs, similar to dictionaries or hashes in programming languages. In YAML, mappings are used to represent associative arrays or objects. They are defined with a colon (:) separating the key from the value.

Example:

key: value name: John Doe

Sequences: These are ordered lists of items, equivalent to arrays or lists in other programming languages. Sequences in YAML are denoted by a dash (-) followed by a space and then the item.

Example:

fruits:

- Apple

- Banana

- Cherry

Detailed Explanation is:
Mappings (B) allow you to define relationships between keys and values, making it possible to represent more complex data structures like dictionaries or objects.

Sequences (C) allow you to represent ordered collections, which is important for listing elements that must maintain a specific order.

YAML is often used in configuration files and data serialization in DevOps environments, such as in Ansible playbooks, Kubernetes manifest files, and CI/CD pipeline definitions. Its simplicity and human-readable format make it a popular choice for these applications.


Reference:

YAML Official Documentation: YAML's specification outlines these core data structures.

Juniper Automation and DevOps Documentation: Provides best practices for using YAML in network automation scripts and configuration management.



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

  1. JET
  2. Puppet
  3. XML
  4. 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.



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

  1. NETCONF layers use the messages layer to receive RPCs from a remote NETCONF server.
  2. NETCONF layers use the messages layer to send RPCs to a remote NETCONF server.
  3. NETCONF layers use the operations layer to receive RPCs from a remote NETCONF server.
  4. 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.



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

  1. cURL
  2. NETCOfJF
  3. Web browser
  4. 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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