200-901 Exam Dumps - DevNet Associate (DEVASC)

A 401 Unauthorized error indicates that the request has not been applied because it lacks valid authentication credentials for the target resource. To resolve this error when making an HTTP GET request to retrieve data using RESTCONF on a CSR 1000V, you need to ensure that the correct authentication credentials (username and password) are provided.

The Ansible playbook provided in the exhibit performs the following tasks:

Uses the ios_command module to issue the show conf command on the CISCO_ROUTER_01 device.

Registers the output of the command into the variable config.

Copies the content of config.stdout[0] (the first line of the command output) to a file in /etc/ansible/configs/.

This sequence of tasks effectively backs up the running configuration of the router by capturing the current configuration output and saving it to a file.

References:

Ansible ios_command Module

Ansible Playbook Basics

In the context of webhooks, an application that interacts with a webhook can be described as a Listener or Receiver:

Listener: The application waits for incoming HTTP POST requests sent by the webhook.

Receiver: The application receives the data payloads from the webhook when certain events occur.

An artifact repository is a key component in a CI/CD pipeline, used to manage binary files and other artifacts produced and consumed during the build process. It helps in organizing and tracking these artifacts through various stages of the pipeline.

Provides Traceability, Search, and Management of Binary Files:

Artifact repositories store binary files and metadata, allowing developers to trace back to the source and understand the context in which an artifact was produced.

These repositories often come with search functionalities to locate specific versions of binaries quickly.

Examples include JFrog Artifactory, Nexus Repository, and AWS CodeArtifact.

Stores Files Needed and Generated During the Build Process:

Artifact repositories store intermediate and final build outputs, dependencies, libraries, and other necessary files.

These repositories support the storage and distribution of build artifacts, ensuring consistent deployment in different environments (e.g., staging, production).

By segmenting the network into separate subnets for clients and servers, you can control the types of traffic that flow between these segments using access control lists (ACLs) and firewall rules. This can enhance security by limiting access to critical server resources and reducing the risk of unauthorized access.

Subnets will split domains to limit failures (Option C):

Segmenting the network into different subnets helps contain network issues within a specific segment, preventing them from affecting the entire network. This approach improves network stability and reliability, as issues in the client subnet will not impact the server subnet and vice versa.

References:

Cisco Subnetting and Network Segmentation

Cisco Router and ACL Configuration Guide

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The HTTP POST method is used by both Meraki and Webex Teams APIs to send webhook notifications. Webhooks are a way for applications to provide other applications with real-time information. The POST method is used to send data to a server to create/update a resource. In the case of webhooks, the POST request carries the event data to the endpoint URL specified by the receiving service. More details on webhooks can be found in the Meraki Webhook Documentation and Webex Teams Webhooks.

The HTTP POST method is used by both Meraki and Webex Teams APIs to send webhook notifications. Webhooks are a way for applications to provide other applications with real-time information. The POST method is used to send data to a server to create/update a resource. In the case of webhooks, the POST request carries the event data to the endpoint URL specified by the receiving service. More details on webhooks can be found in the Meraki Webhook Documentation and Webex Teams Webhooks.

Test-driven development (TDD) is a software development process where the developer first writes a test for a new function, then writes the code to pass the test, and finally refactors the code. The steps in TDD are:

Write a Failing Test Case: Before any code is written, a test case is created to define the desired functionality.

Write Code to Pass the Test: The minimal amount of code necessary to pass the test is written.

Refactor: The code is refactored for optimization and improvement while ensuring that the tests still pass.

When a developer encounters many lines of code doing repetitive tasks, refactoring the code to use functions is a standard practice. This reduces code duplication and enhances readability and maintainability. Functions encapsulate repetitive logic, making the code cleaner and more organized.