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

Cisco Firepower has an API that allows the capability to obtain a list of vulnerable software on user devices. Firepower Management Center (FMC) provides APIs for vulnerability management and allows security teams to query and analyze the vulnerabilities detected on endpoints and network devices.

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

The Ansible playbook in the exhibit consists of two stages:

Stage 1: Restarts the network service on the eth0 interface.

Stage 2: Starts the httpd service.

Stage 1:

- name: stage1

ansible.builtin.service:

name: network

state: restarted

args: eth0

This stage ensures that the network service on the eth0 interface is restarted.

Stage 2:

- name: stage2

ansible.builtin.service:

name: httpd

state: started

This stage ensures that the httpd service is started if it is not already running.

References:

Ansible Playbook Documentation: Ansible Service Module

When conflicts occur during a merge, the git merge --abort command can be used to stop the merge process and revert the repository to its state before the merge began.

Merge Conflicts: Occur when changes from different branches cannot be automatically reconciled.

Abort Merge: git merge --abort undoes the merge process and restores the pre-merge state of the repository.

Option D is correct as it correctly uses the git merge --abort command to revert to the pre-merge state.

Virtual machines (VMs) provide the flexibility and capabilities required to meet the described requirements. VMs can easily migrate between data centers, save and restore their state, and support various operating systems and GUIs.

Migration: VMs can be moved from one physical server or data center to another, providing high flexibility in resource management.

State Saving: VMs support saving the operational state (snapshots), allowing quick recovery or migration.

Support for GUIs: VMs can run different operating systems, including those with graphical user interfaces (GUIs) like Windows and Linux.

Hardware Utilization: VMs enable better utilization of hardware resources by running multiple VMs on a single physical host.

References:

Virtual Machines Overview: VMware VMs

During the integration step of the CI/CD pipeline, code from multiple developers is combined. This step involves compiling the code and running tests to ensure that the different components work together correctly. It is a critical phase for identifying integration issues early in the development cycle.

Before running an Ansible playbook to configure Cisco Nexus devices using the NX REST API, it's important to verify that the REST API requests work as expected. The best resource for this purpose is Cisco Open NX-OS, which provides detailed information and tools for working with the NX-OS REST API.

Cisco Open NX-OS: This platform provides extensive documentation, tools, and examples for using the NX-OS REST API. It is an ideal resource for testing and validating REST API requests before automation.

Other Resources:

Cisco NX-OS SDK: Provides software development tools for NX-OS but is less focused on REST API verification.

Cisco Learning Labs: Offers hands-on labs for learning, but not specifically for REST API testing.

Cisco Code Exchange for Nexus: Provides code examples, but not specifically for testing REST API requests.

References:

Cisco DevNet Associate Certification Guide

Cisco Open NX-OS

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RFC 1918 defines private IP address ranges for use within private networks. The address space 172.16.0.0 to 172.31.255.255 is designated as private and falls under class B.

Class B Address Space: The range 172.16.0.0 to 172.31.255.255 is a private IP address range designated for class B networks.

Subnet Mask: A subnet mask of 255.255.0.0 (/16) is commonly used within this range to create subnets.

References:

RFC 1918 Address Allocation: RFC 1918

To address security concerns about sensitive information such as usernames and passwords in the application code, the best approach is to utilize environment variables. This is a common and recommended practice to enhance security because:

Environment Variables: Storing sensitive information in environment variables helps prevent exposure of these details in the codebase. They can be easily managed and changed without modifying the code.

Separation of Configuration from Code: This approach follows the principle of separating configuration from code, making the application more secure and easier to manage.

Security Best Practices: Using environment variables aligns with security best practices for managing secrets, which include not hard-coding sensitive data and keeping them outside the source code repository.

Hence, using environment variables for storing sensitive details like usernames and passwords (Answer B) is the appropriate and secure solution.

A firehose webhook in the context of Cisco Webex allows an application to receive real-time data updates about events happening within Cisco Webex. It enables the application to subscribe to a stream of data, ensuring that the application receives immediate notifications about any updates or changes in the Webex environment. This is particularly useful for integrating Webex functionalities into other applications and ensuring they are synchronized with the latest data.

References:

Cisco DevNet Associate Certification Guide

Cisco Webex API Documentation