Free Practice Questions for Cisco 200-901 Exam

Virtual machines (VMs) provide the flexibility and capabilities required to meet the described requirements. VMs can easily migrate between data centers, save and restore their state, and support various operating systems and GUIs.

Migration: VMs can be moved from one physical server or data center to another, providing high flexibility in resource management.

State Saving: VMs support saving the operational state (snapshots), allowing quick recovery or migration.

Support for GUIs: VMs can run different operating systems, including those with graphical user interfaces (GUIs) like Windows and Linux.

Hardware Utilization: VMs enable better utilization of hardware resources by running multiple VMs on a single physical host.

References:

Virtual Machines Overview: VMware VMs

The Administrative XML Layer (AXL) API in Cisco Unified Communications Manager (CUCM) allows for various administrative tasks, including the ability to authenticate users. It enables applications to interact with CUCM, retrieving user information, and authenticating users based on their credentials stored in CUCM.

To parse XML data in Python, a developer typically imports a library that provides the necessary functions and methods for XML parsing.

Libraries for XML Parsing: Python has several libraries for parsing XML, such as xml.etree.ElementTree, lxml, and minidom.

Functionality: These libraries offer functions and methods to read, manipulate, and extract data from XML files.

Example:

import xml.etree.ElementTree as ET

tree = ET.parse('file.xml')

root = tree.getroot()

References:

Python XML Parsing: Python XML Documentat

RESTCONF is a protocol used to access data defined in YANG using standard HTTP methods. However, it does not support distributed transactions, which is a requirement in this scenario.

RESTCONF: Supports YANG data models, XML encoding, and can be used in environments with software redundancy.

Distributed Transactions: RESTCONF does not support distributed transactions, which require coordination of a transaction across multiple network devices or components.

Option C is correct as the requirement for distributed transactions prevents the use of RESTCONF.

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

An Ethernet switch operates at the Data Link layer (Layer 2) of the OSI model. Its primary function is to forward frames between devices based on their MAC (Media Access Control) addresses. When a frame arrives at the switch, the switch reads the destination MAC address and forwards the frame to the appropriate port that connects to the device with that MAC address.

MAC Address Table: Switches maintain a MAC address table that maps each MAC address to a specific port. This table is built dynamically as the switch learns the MAC addresses of devices connected to its ports.

Frame Switching: By using the MAC address table, the switch can efficiently switch frames only to the destination port, which reduces unnecessary traffic on other ports and improves network performance.

References:

Cisco DevNet Associate Certification Guide

Cisco Ethernet Switch Operation

To enable keepalive for the FastEthernet 2/0 interface using YANG data models and NETCONF in Python, the following steps are required:

Create an Interface Object:

interface = model.Native.Interface.FastEthernet()

This line creates an instance of the FastEthernet interface from the YANG model.

Set the Interface Name:

interface.name = '2/0'

This line sets the name of the interface to 2/0.

Enable Keepalive:

interface.FastEthernet.keepalive_settings.keepalive = True

This line enables the keepalive setting on the FastEthernet interface.

Read the Current Configuration:

interface_data = crud.read(provider, interface)

This line reads the current configuration of the interface from the device.

Update the Configuration:

crud.update(provider, interface)

This line updates the device configuration with the new settings, enabling keepalive on the specified interface.

References:

Cisco YANG Data Models: Cisco YANG Models

YANG Development Kit (YDK): YDK Documentation

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.

References:

Securing Secrets

HashiCorp Vault

AWS Secrets Manager

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