300-435 Automating Cisco Enterprise Solutions (ENAUTO) Questions and Answers

YANG-push telemetry data offers several benefits over traditional data collection methods such as SNMP polling. One significant advantage is that it uses less bandwidth because it sends updates only when there’s a change in subscribed data, rather than repeatedly polling all devices at regular intervals regardless of changes. This makes it more efficient and reduces unnecessary network traffic. Additionally, YANG-push telemetry scales better than SNMP because it can handle more frequent updates from a large number of devices without overwhelming the network or management systems. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

The exhibit is a read-only YANG leaf ("ro vlan") therefore is classed as "state" date and not config data. As such the statement is what you need to use to interact with this particular YANG model. Reference documentation: https://blogs.cisco.com/developer/ask-hank-yang-leaves

 Zero-Touch Provisioning (ZTP) is a method for automating the configuration of network devices upon initial power-up using DHCP and TFTP. It minimizes manual intervention, streamlining the deployment process and reducing errors. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

The purpose of using the Cisco SD-WAN vManage Certificate Management API is to install signed certificates. This API facilitates secure communication within the SD-WAN infrastructure by allowing administrators to manage and deploy certificates that verify the identity of devices and services. References: ( Automating Cisco Enterprise Solutions Official Cert Guide )

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 The Cisco SD-WAN vManage Troubleshooting Dashboard APIs capture various details during troubleshooting, including the connections summary. This summary provides an overview of all control connections from the vManage NMS to the vSmart controllers, WAN Edge routers, and vBond orchestrators in the overlay network. It displays the status of these connections, which is crucial during a network outage to identify and troubleshoot the cause of the issue.

References := Automating Cisco Enterprise Solutions Official Cert Guide, Cisco SD-WAN vManage Help - Dashboard3, Cisco Catalyst SD-WAN Monitor and Maintain Configuration Guide

 Python virtual environments should be used in cases where there are conflicting Python package versions across multiple projects (Option B) to ensure each project can have its own set of dependencies. Additionally, they are beneficial when starting a new project that requires a clean development environment (Option E), as it allows for a controlled setup without interference from other projects’ dependencies. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

MV Sense MQTT API has the capability to request and subscribe to historical, current, or real-time data. This allows applications to receive updates about what’s happening in an environment monitored by Meraki MV smart cameras. References: Automating Cisco Enterprise Solutions Official Cert Guide

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To create a Python script that pulls inventory for Cisco SD-WAN Viptela devices using the Viptela library, the correct action is:

• C: from viptela.viptela import Viptela. This import statement is used to import the Viptela class from the viptela.viptela module, which is part of the Python SDK for Cisco Viptela vManage. This SDK allows for interaction with Cisco SD-WAN Viptela devices through various API calls, enabling the automation of tasks such as pulling inventory data1.

References:

• CiscoDevNet/python-viptela: Cisco Viptela vManage Python CLI/SDK on GitHub

To access the hostname from the JSON data assigned to the variable “d”, one must navigate through the nested dictionaries and lists. The correct syntax in Python for accessing a dictionary is using square brackets with the key as a string. Therefore, ‘d[“data”]’ accesses the value associated with the key “data”, which is a list. ‘[0]’ accesses the first item in that list, which is another dictionary. Finally, ‘[“host-name”]’ retrieves the value associated with “host-name” from that dictionary. References: ( Automating Cisco Enterprise Solutions Official Cert Guide )

When making an HTTP GET call to obtain site health from Cisco DNA Centre, the JSON response includes various health indicators. The clientHealthAverage is a key metric that represents the average health of clients connected to the site, which can include both wired and wireless clients. This metric provides a general overview of the client health status within the site. On the other hand, overallBadDevices is another important metric that indicates the number of devices that are in a ‘bad’ state, which could be due to issues like high utilization, errors, or other factors affecting their performance. These two metrics are crucial for administrators to quickly assess the health of the site and identify areas that may require attention or troubleshooting.

References := Health Monitoring - Cisco Catalyst Center 2.3.7 - Cisco DevNet (Automating Cisco Enterprise Solutions Official Cert Guide)

It can be filtered using the searchBy query and it can be: MAC Address or Device Name value or UUID of the network device https://developer.cisco.com/docs/dna-center/#!get-device-detail

The error is due to Command Runner in Cisco DNA Center being designed to support only the execution of ‘show’ commands or other read-only commands. When an engineer tries to execute configuration commands or any commands that are not read-only, they will be blocklisted as these are not supported by Command Runner. This ensures that Command Runner is used strictly for retrieving information without making any configuration changes to devices. References := (Automating Cisco Enterprise Solutions Official Cert Guide)

The provided exhibit likely shows a POST request setup in an API testing tool like Postman, with JSON formatted data specifying commands for configuring a network device interface. These commands are not supported by Command Runner as it does not allow configuration changes, only read operations.

The ENAUTO exam tests knowledge of implementing enterprise automated solutions, including programming concepts, Python programming, APIs, controllers, and automation tools. Without the specific Python code from the exhibit, I can’t provide the expected output. Generally, Python code in the context of ENAUTO might involve interacting with APIs or automating network configurations. The output would depend on the code’s function, such as retrieving data from an API or configuring network devices. References := Automating Cisco Enterprise Solutions Official Cert Guide

To create a new network using the Meraki API, the correct HTTP action is POST. A POST request to the specified URL with the new organization ID and the required body parameters will create a new network and result in a 201 response code, indicating that the resource has been successfully created.

References := Automating Cisco Enterprise Solutions Official Cert Guide

The location accuracy of a device using scanning APIs can be influenced by several factors. AP placement is crucial because it determines signal coverage and strength, which directly affects how accurately a device can be located. The amount of device antennas also plays a significant role; more antennas can provide more data points for triangulation, leading to improved location accuracy. References: (Automating Cisco Enterprise Solutions Official Cert Guide)

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• It is a device-independent method for automation and can be used with any type of device or operating system:
• It does not require any modules of software except SSH to be loaded on the network device:

Comprehensive and Detailed Step by Step Explanation:

• It is a device-independent method for automation and can be used with any type of device or operating system:
• It does not require any modules of software except SSH to be loaded on the network device:

References:

• Automating Cisco Enterprise Solutions Official Cert Guide
• Ansible Documentation

 The NETCONF  operation is used to retrieve running configuration and state data from the network device. In the provided exhibit, the  operation includes a filter that specifies two YANG models: Cisco-IOS-XE-native and Cisco-IOS-XE-ntp-oper. The first model, Cisco-IOS-XE-native, is indicated by the namespace “http://cisco.com/ns/yang/Cisco-IOS-XE-native” and includes details such as hostname and IP address within its hierarchy. The second model, Cisco-IOS-XE-ntp-oper, is indicated by the namespace “http://cisco.com/ns/yang/Cisco-IOS-XE-ntp-oper” and includes details related to NTP (Network Time Protocol) associations and status information. Therefore, the NETCONF   operation in this exhibit interacts with two YANG models. References: = ( Automating Cisco Enterprise Solutions Official Cert Guide )

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In Ansible, the ‘state’ parameter is used to specify the desired state of a resource on the target system. For configuring an NTP server on a Cisco IOS XE device, ‘state: present’ ensures that the NTP server with the specified IP address is configured on the device. The options ‘true’, ‘started’, and ‘installed’ are not valid states for this type of resource in Ansible. The ‘present’ state is used to ensure that an entity exists, which in this case refers to making sure that the NTP server configuration exists without authentication and logging.

References: Automating Cisco Enterprise Solutions Official Cert Guide

Python virtual environments are a tool used to create isolated Python environments, each with its own set of dependencies. This isolation is beneficial for several reasons:

• D: Virtual environments allow developers to create a Python environment quickly for testing and debugging purposes. This is because each virtual environment can have its own set of dependencies, which may be different from those installed globally or in other virtual environments. This isolation helps ensure that the environment reflects the production environment as closely as possible, which is crucial for accurate testing and debugging12.
• E: They enable the creation of an isolated Python environment with module dependencies. This means that the dependencies installed in a virtual environment do not affect the system-wide Python installation or other virtual environments. This isolation prevents conflicts between project dependencies and allows for more precise control over the environment in which your code runs12.

References:

• Automating Cisco Enterprise Solutions Official Cert Guide
• Real Python’s "Python Virtual Environments: A Primer"1
• Dataquest’s "A Complete Guide to Python Virtual Environments"

The correct code snippet for detecting a change in OSPF neighbors and displaying an alert message is Option C. This option includes a check for ‘OSPF-neighbor-state-change’ within the ‘Correlation Engine’ data returned by the API call. If this key exists and its value is not 0, indicating a state change has occurred, it prints out an alert message “OSPF neighbor change detected!” This logic correctly implements the required functionality.

References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

The YANG module tree diagram represents the data model for network configuration and state data used by management protocols like NETCONF and RESTCONF. In this diagram, containers are denoted by curly braces {} and represent groupings of related data within the model. The three containers identified in the image are “interface,” “statistics,” and “discontinuity-time,” which organize related configuration or state information.

References: Automating Cisco Enterprise Solutions Official Cert Guide

The YANG module defines a structure for network interfaces, including elements such as “name,” “address,” “netmask,” and “subnet.” The valid XML instance must adhere to this structure. Option A presents an XML instance that correctly reflects the hierarchy and elements specified in the YANG module, with appropriate namespace declarations and values for each element that are consistent with their definitions in the YANG model.

References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

 To create a new network called “Test” using the Meraki API, the correct URI is the one that uses the POST method to the endpoint that includes the organization ID but not a specific network ID. Therefore, option D is the correct answer. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

This API request is constructed to query the Cisco SD-WAN vManage Statistics API for application route statistics based on the specified device ID and colors for the local and remote endpoints. References: (Automating Cisco Enterprise Solutions Official Cert Guide)

 A HTTP 206 status code is returned when the server successfully processes a partial GET request specified by the range header in the client’s request. This is commonly used in situations where large files are being transferred, and the client needs to download or stream only a portion of the file. References := (Automating Cisco Enterprise Solutions Official Cert Guide)

The dampening period setting used for an on-change publication in YANG-push versus Openconfig is ‘0’. This setting indicates that there is no dampening period, and changes are reported immediately. 

The JSON formatted output from a network monitoring tool indicates that there is one unmonitored device in the access category. Additionally, the “healthScore” section shows values for “badCount” and “badPercentage” greater than zero, suggesting at least one device in this category has performance issues. Since this falls under the Access category, it can be inferred that an access switch is functioning in a degraded state. References: Automating Cisco Enterprise Solutions Official Cert Guide

 The two Netmiko methods used to configure a device are send_config_set() and send_config_from_file(). The method send_config_set() is used to send configuration commands to a network device in an interactive session. This can be done as part of an automated script or manually entered commands. On the other hand, send_config_from_file() allows for sending configurations from a file which can be useful for larger configurations or standard config deployments across multiple devices. References: Automating Cisco Enterprise Solutions Official Cert Guide