Cisco 200-901 - DevNet Associate (DEVASC)

To copy a file from one directory to another and rename it in the process, the cp (copy) command in Linux can be used with the appropriate source and destination paths:

Command Breakdown:

cp: The copy command.

./TEST/config.txt: The source file path.

./PROD/current.txt: The destination file path with the new name.

Thus, the correct command to achieve this task is: cp ./TEST/config.txt ./PROD/current.txt

References:

Linux cp Command Manual

Cisco DevNet Associate Certification Guide

The exhibit shows the router configuration for NAT (Network Address Translation). To allow traffic from the security cameras to access the Internet, the access list needs to include a permit statement for the 192.168.10.0/24 subnet.

Access List Configuration: The access list (ACL) should permit traffic from the security camera VLAN (192.168.10.0/24).

NAT Configuration: The NAT configuration uses an ACL to determine which internal IP addresses are translated to the public IP address pool.

Missing Permit Statement: Without a specific permit statement for the 192.168.10.0/24 subnet, the router does not translate the IP addresses from this subnet, resulting in a lack of Internet access for the security cameras.

References:

Cisco NAT Configuration Guide: NAT Configuration

The provided JSON configuration includes information about a GigabitEthernet interface with the name "2". To retrieve information about this specific interface using a RESTCONF API call, the correct HTTP method and URL must be used.

HTTP Method: The GET method is used to retrieve information from the server.

Correct URL: The URL must specify the path to the particular interface. The correct URL structure includes the native and interface resources, followed by the interface type (GigabitEthernet) and its specific name ("2").

The correct RESTCONF API call to retrieve the information would be:

GET https://devnetlab.local/restconf/api/running/native/interface/GigabitEthernet/2/

This URL correctly targets the specific GigabitEthernet interface named "2" in the running configuration.

References:

Cisco RESTCONF API Documentation: RESTCONF API Guide

Importing Libraries: The script imports the requests and json libraries necessary for making HTTP requests and handling JSON data.

URLs Definition: The url1 variable holds the Webex API endpoint for creating webhooks, and url2 is the target URL where Webex will send the messages.

Token Handling: The token variable contains the OAuth2 token required for authentication with the Webex API.

Setting Headers: The headers dictionary includes the Content-Type set to application/json and the correct Authorization header that uses the Bearer token.

Payload Preparation: The payload dictionary contains the necessary information to create the webhook, including its name, target URL, resource type, and event.

Making the Request: The requests.request method sends a POST request to the Webex API endpoint with the specified headers and payload.

Printing the Response: The response from the Webex API is printed out, encoded in 'utf-8'.

The Cisco Finesse platform is designed to provide a customizable interface for contact center agents and supervisors. One of its key characteristics is the ability to invoke services based on network-triggered events, allowing for dynamic and responsive workflows within the contact center environment.

An HTTP 502 Bad Gateway error indicates that the server acting as a gateway or proxy received an invalid response from the upstream server. This suggests there may be an issue with the configuration or availability of the server behind the load balancer.

HTTP 502 Error: This error occurs when the load balancer or gateway receives an invalid response from the backend server.

Server Configuration: The issue is likely due to misconfiguration or problems with the backend server that needs to be resolved.

Option A is correct as it identifies that the issue lies with the server configuration behind the load balancer.

To set an environmental variable in a Linux system using Bash, the export command is used. This command sets the environment variable for the current session, and any subsequent commands or processes will inherit this environment variable.

For example, to set an environment variable named "website" with the value "cisco.com", you use the following command:

export website="cisco.com"

This sets the variable website and makes it available to any subprocesses started from the shell.

References:

GNU Bash Reference Manual - Bash Builtin Commands

Cisco DevNet Associate Certification Guide

CSRF (Cross-Site Request Forgery) is an attack that forces an end user to execute unwanted actions on a web application in which they are currently authenticated. It exploits the trust that a web application has in the user's browser.

Authenticated Session Exploit: CSRF takes advantage of the fact that the user is already authenticated, making the attack appear legitimate.

Unwanted Actions: The attacker tricks the user into performing actions without their knowledge.

Option D is correct as CSRF is the OWASP threat that exploits authenticated sessions to execute attacks.

NTP (Network Time Protocol) is the protocol used for clock synchronization between network devices. It synchronizes the clocks of computers and network devices to ensure that all devices in a network have the same time, which is crucial for logging events, security protocols, and coordinating time-sensitive operations.