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

A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It establishes a barrier between a trusted internal network and untrusted external networks, such as the Internet. Firewalls can be hardware-based or software-based. They are essential for network security as they help protect against threats and unauthorized access.

References:

Cisco DevNet Associate Exam Topics: Network Fundamentals (understand the role and function of firewalls in network security)

Cisco Networking Basics: Network Security Devices and Firewalls (explains the functions and importance of firewalls)

1 – E, 2 – B, 3 – D, 4 – A

Grpc == http/2 , netconfig == ssh , restconfig == https

The two protocols used to apply configuration changes on a Cisco IOS XE device are:

RESTCONF: A REST-like protocol used for accessing data defined in YANG, using the datastore concepts defined in NETCONF. It allows the application of configurations and retrieval of state information using HTTP methods.

NETCONF: A protocol defined to manage configurations and monitor devices. It uses remote procedure calls (RPCs) to apply changes in a structured data format defined by YANG.

References: Cisco DevNet Associate Certification Guide, Chapter on Network Management Protocols including NETCONF and RESTCONF.

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.

The cURL command is used to make HTTP requests from the command line. To retrieve a resource in JSON format using OAuth, the command must include the following:

Authorization header: Use the -H option to include the OAuth access token for authentication.

Accept header: Specify that the response should be in JSON format by using the -H option with Accept: application/json.

URL: Provide the URL of the API endpoint.

This command retrieves the specified resource from the API, using the provided OAuth token to authenticate the request and requesting the response in JSON format.

When configuring a Cisco IOS XE device using RESTCONF, the default data-encoding method is XML. RESTCONF is a protocol used to access configuration data and operational data using a REST-like API, and it uses XML as the default encoding method for data exchange.

XML: Used as the default encoding method for RESTCONF.

x-form-encoding: Not used by RESTCONF.

YANG: A data modeling language used to model configuration and state data manipulated by NETCONF and RESTCONF, but not an encoding method.

YAML: Not used by RESTCONF.

Code review is typically performed before the merge of code in a version control system. This process involves examining code changes to ensure they meet the required standards, are free of bugs, and align with the project’s goals. The review usually happens after code has been committed to a feature branch but before it is merged into the main branch. This helps maintain the integrity of the main branch and ensures that any issues are caught early. More information can be found in best practices for code review.

1 – B, 2 – D, 3 – A, 4 – C

git add .

git commit -m “this is my edit”

git push