200-901 Exam Dumps - DevNet Associate (DEVASC)

The data plane, also known as the forwarding plane, is responsible for handling the actual movement of packets through the network device, including Quality of Service (QoS). QoS involves managing and prioritizing network traffic to ensure that critical applications receive the necessary bandwidth and performance levels. The data plane processes and forwards data packets based on the policies set by the control plane.

References:

Cisco DevNet Associate Certification Guide

Cisco Networking Essentials, Chapter on Network Device Planes

Implementing common data structures when working with APIs in remote systems has multiple benefits:

Enforces standardized data structures: This ensures consistency and interoperability across different systems and APIs, making it easier to integrate and communicate between various components.

Leverages code that is easily managed and reused: Standardized data structures lead to more maintainable and reusable code. Developers can build upon existing frameworks and libraries without having to rewrite data handling logic for each new API.

References: Cisco DevNet Data Structures

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The Ansible playbook in the exhibit is designed to automate the configuration of HSRP (Hot Standby Router Protocol) on a Cisco Nexus switch listed in the nxos_rtr inventory group. Here’s what the playbook does:

Hosts: The playbook is targeting nxos_rtr hosts.

Task: The task uses the nxos_hsrp module to configure HSRP.

Parameters: Various parameters such as group, VIP, priority, interface, authentication, and version are set for HSRP configuration.

Delegation: The configuration is delegated to the srv-1a inventory host, but it is still targeting the nxos_rtr for the actual HSRP configuration.

Therefore, the playbook is enabling HSRP on the nxos_rtr inventory host.

References:

Cisco DevNet Associate Certification Guide

Ansible Documentation for nxos_hsrp Module

JSON (JavaScript Object Notation) and XML (eXtensible Markup Language) are both used for data interchange but have different characteristics:

Human Readability: JSON is often considered more human-readable because it is more concise and closely resembles the structure of programming languages like JavaScript.

Support for Arrays: JSON natively supports arrays, making it straightforward to represent lists of values. XML can represent arrays, but it does not do so natively and requires additional markup to represent arrays.

Data Mapping: XML provides extensive support for mapping data structures, including attributes and mixed content, making it suitable for complex data structures.

Data Types: JSON is lighter and provides sufficient data types for many applications (strings, numbers, objects, arrays, booleans, and null), whereas XML can be more verbose and supports a broader range of data types.

References:

JSON vs XML - W3Schools

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.

HTTPS (Hypertext Transfer Protocol Secure) uses port 443 by default. This port is used to secure communications over a computer network, particularly over the internet, by encrypting data between the client's browser and the web server using SSL/TLS.

References:

Cisco DevNet Documentation - Ports and Protocols

Cisco DevNet Associate Certification Guide