Cisco 200-901 Practice Test - Questions Answers, Page 45

Infrastructure as Code (IaC) applies software development practices to infrastructure management. This approach uses code to provision and manage IT infrastructure, enabling version control, automated testing, and continuous delivery.

Automated Provisioning: IaC scripts automate the setup and configuration of infrastructure resources.

Consistency: By defining infrastructure in code, environments can be consistently reproduced across different stages (development, testing, production).

Development Practices: IaC allows infrastructure to be managed with the same tools and processes as application code, including version control and automated testing.

Infrastructure as Code Overview: IaC Introduction

Latency refers to the delay between a client request and a server response. A large distance between a client device and a host server increases the latency due to the time it takes for data to travel over the network.

Latency: The time delay experienced in a system, particularly in networking, where it refers to the time taken for data to travel from the source to the destination.

Impact: High latency can result in slow response times, negatively impacting the performance of applications, especially those requiring real-time interactions.

Network Latency Overview: Network Latency

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.

RFC 1918 Address Allocation: RFC 1918

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.

Cisco RESTCONF API Documentation: RESTCONF API Guide

Cisco Intersight is a cloud-based management platform that provides comprehensive management for Cisco UCS and HyperFlex systems. It integrates with Cisco UCS Director and UCS Manager to control server, network, storage, and virtual resources, supporting policy-driven management for up to 10,000 physical Cisco servers. Intersight offers advanced capabilities such as proactive support and a robust API for automation and integration, ensuring seamless operations across various infrastructures.

Cisco Intersight Overview

To protect secrets such as API URLs, shared keys, and other application configurations, it is best practice to: C. Ensure they never appear in plaintext at rest or in transit. Encrypt sensitive data both when it is stored (at rest) and when it is transmitted over the network (in transit). This prevents unauthorized access and exposure. E. Always store secrets in a secure vault. Use dedicated secret management tools like HashiCorp Vault, AWS Secrets Manager, or Azure Key Vault to store and manage sensitive information securely. These tools provide mechanisms for access control, audit logging, and automatic rotation of secrets.

Securing Secrets

HashiCorp Vault

AWS Secrets Manager

Device-level management allows for more granular control over the specific settings and configurations of individual network devices. This is beneficial in scenarios where fine-tuning of device settings is required, and where certain configurations may not be exposed or supported by the overarching controller. Controller-level management, on the other hand, abstracts many device-specific settings to provide a more uniform and simplified management interface, which may not support all the detailed configurations available at the device level.

Cisco DevNet: Device vs. Controller Management

Organizing code into modules improves maintainability by encapsulating functionality into smaller, more manageable pieces. This modular approach allows developers to focus on specific sections of code without being overwhelmed by the entire codebase. It also makes it easier to debug, test, and update parts of the application independently, enhancing overall code quality and maintainability.

Modular Programming - Python Documentation

When using OAuth2 authentication for accessing a protected resource via a REST API, the typical flow involves obtaining an access token which can then be used to authenticate subsequent API requests. The correct process is:

POST Call to /login: Make a POST request to the /login endpoint with the user credentials (username and password) in the request body. This call will authenticate the user and, if successful, return an access token.

Use the Token: Use the retrieved token by including it in the Authorization header (usually as a Bearer token) in the request to access the protected resource, in this case, the /item endpoint.

OAuth 2.0 Authorization Framework - RFC 6749