Pass the Cisco Certified DevNet Associate 200-901 Questions and answers with ExamsMirror

Simplifying the wording: Webhook enables the app to ( push or receive real time) . The clients Webhooks enable applications to receive real-time data by providing a mechanism for one application to send data to another as soon as an event happens. This is done through HTTP callbacks, where an event in the source system triggers an HTTP POST request to a predefined URL in the destination system. This allows the destination system to process the data immediately, ensuring real-time updates.

The Python script provided is designed to make a POST request to a REST API to create a new task in a to-do list application. Here's a step-by-step explanation of the script:

Import the requests library to handle HTTP requests.

Define the task dictionary with summary and description.

Use the requests.post method to send a POST request to the specified URL, passing the task data as JSON and setting the appropriate Content-Type header.

Check if the response status code is not 201 (which indicates successful creation). If it's not, raise an ApiError with the status code.

Print the created task's ID from the JSON response.

The provided code options are:

requests: the library used for making HTTP requests.

status_code: used to check the HTTP response status.

Content-Type: a header specifying the media type of the resource.

raise: used to raise an exception if the status code is not as expected.

return is not used in this context.

References:

Cisco DevNet Associate Certification Guide

Python Requests Library Documentation

HTTP status code 429 indicates that too many requests have been sent in a given amount of time, which is a sign of rate limiting. Rate limiting is used by APIs to control the amount of incoming requests to prevent abuse or overloading the server. In this case, the Cisco Prime API is limiting the number of requests the network engineer can make in a certain time period, resulting in only a subset of devices being returned and some requests being rejected with a 429 status code.

References:

Cisco DevNet Associate Certification Guide

HTTP Status Code Definitions

The Dynamic Host Configuration Protocol (DHCP) is responsible for automatically assigning IP addresses to devices on a network. When a device connects to the network, it sends a broadcast request for an IP address, and a DHCP server responds with an IP address, subnet mask, default gateway, and DNS server information. This process simplifies network administration by automating IP address assignment and ensuring that devices have unique IP addresses without manual configuration.

References:

Cisco DHCP Overview

RFC 2131: DHCP

Cross-Site Request Forgery (CSRF) is a type of attack that forges a malicious HTTP request and sends it from a user's browser to a different site where the user is authenticated. The attacker tricks the user into executing unwanted actions on a web application in which the user is currently authenticated. This can lead to unauthorized actions being performed on the user's behalf.

References:

Cisco DevNet Associate Certification Guide

OWASP CSRF Prevention Cheat Sheet

In this scenario, the developer is retrieving a large number of messages from a Cisco Webex space, and the server only sends a subset of the total messages at a time. This is an example of pagination, where the data is split into multiple pages or chunks, and the client must make additional requests to retrieve the next set of data.

Pagination: This is a common API constraint used to handle large datasets by breaking them into manageable pages.

Subsequent Requests: The client needs to send subsequent requests to get the remaining data.

Option C is correct as it describes the constraint where data is divided into multiple pages and requires additional requests to retrieve all data.

In Ansible, when using the netconf_config module to automate configuration tasks that include unique interface variables for each device, the variables should be defined in individual YAML files within the host_vars directory. This directory contains host-specific variable files named after each host, allowing Ansible to load the appropriate variables for each device during playbook execution.

References:

Ansible Documentation - Variable precedence

Cisco DevNet Associate Certification Guide

An HTTP 404 status code indicates that the requested resource could not be found. In the context of the Cisco DNA Center API, this usually means that the URL being accessed is incorrect or the endpoint does not exist. The solution is to verify and correct the API URL to ensure it points to a valid endpoint.

Example correct API URL:

url = 'https://sandboxdnac.cisco.com/dna/intent/api/v1/... '

This ensures that the script is making requests to the correct API endpoint.

References:

Cisco DNA Center API Documentation

Cisco DevNet Associate Certification Guide