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

Cisco Intersight is a platform designed to manage data center infrastructure through third-party tools and system integrations. It provides a unified management platform that integrates with Cisco UCS, HyperFlex, and other data center components, allowing for comprehensive infrastructure management, automation, and orchestration.

References:

Cisco Intersight - Overview

Cisco DevNet Associate Certification Guide

The diff command is used to compare the contents of two files and display the differences. The -u option stands for "unified" and shows the differences in a unified format, which includes the lines that differ between the two files along with a few lines of context.

When running the command diff -u file1.txt file2.txt, it compares the two files and shows the differences between them.

References:

GNU Diffutils: Unified Format

import requests

data = {

"id": 11,

"summary": "Request summary"

}

response = requests.post('https://todolist.example.com/tasks/ ', json=data)

if response.status_code != 201:

raise ApiError('POST /tasks/ {}'.format(response.status_code))

for item in response.json():

print('{} {}'.format(item['id'], item['summary']))

Importing the Requests Library:

The requests library is used to make HTTP requests in Python. It is a popular third-party library that simplifies interactions with web APIs.

Creating the Data Payload:

The data dictionary contains the information to be sent in the body of the POST request. It includes an id and a summary.

Making the POST Request:

The requests.post method is used to send a POST request to the specified URL (https://todolist.example.com/tasks/). The json=data parameter automatically converts the data dictionary to a JSON-formatted string and sets the appropriate headers.

Checking the Response Status Code:

The script checks if the status_code of the response is not equal to 201. A status code of 201 indicates that the request was successful and a resource was created.

If the status code is not 201, an ApiError is raised with a message that includes the status code.

Processing the JSON Response:

The response.json() method is used to parse the JSON response into a Python dictionary.

The script iterates over the items in the JSON response and prints the id and summary of each item.

References:

Cisco DevNet Associate Certification Guide, Sections on interacting with REST APIs using Python

Official documentation for the Requests library: Requests: HTTP for Humans

Ansible is a powerful automation tool used for IT tasks such as configuration management, application deployment, and task automation. In the context of the exhibit, Ansible can be used to automate the removal of a Cisco Meraki device from the network and retrieve device information.

Device Management: Ansible modules, such as the meraki_device module shown in the exhibit, allow for the management of Meraki devices. Tasks can include querying device information and changing the state of the device.

Automation with Playbooks: The Ansible playbook in the exhibit demonstrates how to authenticate, define the organization and network, and manage the device state (query or absent).

Task Execution: The playbook is structured to perform tasks using a loop (with_items) to execute actions such as querying device details and removing the device (absent state).

References:

Ansible Documentation for Meraki Modules: Ansible Meraki Modules

The Bash script provided in the exhibit performs two find commands:

find /home/user/backup -mtime +30 -type f -print: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and prints their names.

find /home/user/backup -mtime +30 -type f -delete: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and deletes them.

Thus, the workflow being automated by this Bash script is the deletion of backup files that are older than 30 days.

References:

GNU find Documentation

Cisco DevNet Associate Certification Guide

Simple Network Management Protocol (SNMP) is widely used for network management and monitoring. It allows administrators to monitor and manage network devices such as routers, switches, and servers by collecting information on device performance, status, and errors.

SNMP: Provides a framework for exchanging management information between network devices. It helps in monitoring network performance, detecting faults, and configuring devices remotely.

Other Protocols:

DHCP: Used for dynamic IP address assignment.

DNS: Resolves domain names to IP addresses.

NTP: Synchronizes time across network devices.

References:

Cisco DevNet Associate Certification Guide

Cisco SNMP Overview

Routers play a crucial role in networking by providing several key functions, including:

Broadcast Domain Segmentation: Routers separate broadcast domains, preventing broadcast traffic from one network segment from spreading to another. This improves network efficiency and reduces unnecessary traffic.

Routing: Routers forward packets between different networks based on IP addresses, enabling communication between devices on different subnets or networks.

Network Address Translation (NAT): Routers can perform NAT, which allows multiple devices on a local network to share a single public IP address.

References:

Cisco DevNet Associate Certification Guide

Cisco Router Functions

Refer to the exhibit which shows a sequence diagram illustrating a client-server interaction. The correct sequence of steps that match the code snippet is as follows:

Step 1: POST /events - The client posts an event to the server.

Step 2: GET /messages/<messageId> - The client retrieves the message details from the server using the message ID.

Step 3: Response /messages/<messageId> - The server responds with the message details.

Step 4: GET /team-memberships?teamId=<teamId> - The client retrieves team membership details using the team ID.

Step 5: POST /message - The client posts a message.

Step 6: Response /message - The server responds with the message confirmation.

The correct code snippet represents the sequence diagram correctly:

@flask_app.route('/events', methods=['POST'])

def webex_teams_webhook_events():

json_data = request.json['data']

response = requests.get(MESSAGE_URL + json_data['id'], headers=headers)

if response.json()['text'] == 'Alert':

response = requests.get(TEAM_MEMBERSHIPS_URL, headers=headers, params=params)

for info in response.json()['items']:

data = {'personId': info['personId'], 'text': 'Alert'}

Bandwidth is the network constraint that affects the performance of an application as the number of users accessing the application increases. Bandwidth refers to the maximum rate of data transfer across a network path. If the bandwidth is insufficient to handle the increased traffic, the application performance will degrade, leading to slower response times and potential timeouts.

References:

Cisco DevNet Documentation - Network Performance

Cisco DevNet Associate Certification Guide

Telnet is a network protocol that allows a user to communicate with a remote device or server. The default TCP port used by Telnet is port 23. This port is standardized and commonly used for Telnet connections to access network devices for administrative purposes.