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

The JSON instance in the exhibit represents a structured data format for configuring an interface on a network device. The correct answer is “interface-configurations” because the JSON structure starts with “Cisco-IOS-XR-ifmgr-cfg:interface-configurations,” indicating that it pertains to interface configurations within Cisco IOS XR. References: Automating Cisco Enterprise Solutions Official Cert Guide

• The /dna/intent/api/v1/issues API request provides information about network issues detected by Cisco DNA Center.
• It includes details about the issue, impacted hosts, and suggested actions for resolution.

References:

• Cisco DevNet - Intent APIs

 Native YANG models are specific to a vendor’s platform, incorporating proprietary features, whereas OpenConfig models are vendor-neutral and created for interoperable use across different platforms.

• B. The ethernetCsmacd type is imported from the iana-if-type module: This is correct because the XML response shows ethernetCsmacd, indicating that the ethernetCsmacd type is defined within the iana-if-type module.
• D. ipv4 is a container defined in the ietf-ip module: This is accurate as the XML response includes , which specifies that ipv4 is a container within the ietf-ip module.

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

The Meraki Location Scanning API is designed to provide location-based services. Mapping and wayfinding solutions are built using this API to help users navigate physical spaces, making options B and E the correct answers. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

 Developing an application in a Python virtual environment allows for isolation from other Python projects. This means that the dependencies, Python versions, and libraries for one project will not interfere with those of another, ensuring a clean and controlled development environment.

References := Automating Cisco Enterprise Solutions Official Cert Guide

 To resolve the issue of end users not being able to connect to the network and poor signal strength with a missing or unknown APN status message, one should use the device/cellular/status vManage resource URI. This resource allows for checking the cellular interface’s status, including radio signal strength, which is crucial for maintaining a reliable connection. Ensuring that there is sufficient radio signal strength can help resolve connectivity issues and improve network performance. References: Automating Cisco Enterprise Solutions Official Cert Guide

The NETCONF statement type represented by “±-rw address* [ip]” is a ‘list’. In YANG, which is the data modeling language used by NETCONF, a ‘list’ statement defines a sequence of list entries. Each entry is like a row in a table. The “+” indicates that this is a configuration data node, “rw” means read-write, and the asterisk (*) signifies that multiple address entries are allowed (hence it’s a list), with “ip” being the key for each unique entry in the list. References: Automating Cisco Enterprise Solutions Official Cert Guide

When integrating a Grafana dashboard with Cisco DNA Center to receive network events, the integration bundle that is enabled is:

• C: Network Events for REST API Endpoint. This integration allows Grafana to receive network event notifications from Cisco DNA Center. The REST API Endpoint serves as the interface through which Grafana can subscribe to and receive network events, which can then be visualized on the dashboard1.

References:

• Automating Cisco Enterprise Solutions Official Cert Guide
• Cisco DNA Center documentation on Grafana Labs2
• Cisco Community discussion on using DNA Center as a datasource in Grafana3
• Cisco developer blog on DNA Center NOC Dashboard

The MV Sense API provides various endpoints for different types of data. The endpoint that provides LUX level, which is a measure of light intensity, is option A. References := ( Automating Cisco Enterprise Solutions Official Cert Guide )

The curl command used to update settings typically involves making an HTTP PUT request to modify existing resources on the server. In this case, to update the SNMP community of network ID “1234567” to read-only, one would need to use a curl command that specifies the PUT method, includes headers indicating content type (usually application/json), and provides authentication credentials if necessary. The correct command should also include the appropriate body content specifying the new SNMP community settings. References: Automating Cisco Enterprise Solutions Official Cert Guide

Graphical user interface, application Description automatically generated

The get_config method from the ncclient library is used to retrieve the running configuration from a Cisco IOS XE device using NETCONF. The ‘running’ parameter specifies that the running configuration should be collected. References: (Automating Cisco Enterprise Solutions Official Cert Guide)

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 )

 MQTT is a lightweight messaging protocol that operates on a publish-subscribe model, allowing clients to subscribe to topics and receive messages sent to those topics by any client. It is designed for connections with remote locations where a small code footprint is required or network bandwidth is limited.

https://developer.cisco.com/docs/dna-center/#!device-provisioning/goal

 Cisco IOS XE Software supports two main data modeling languages for its network programmability interface: RESTCONF and NETCONF. RESTCONF provides an API that uses HTTP methods for a programmatic interface over HTTP/HTTPS web services with support for both JSON and XML data formats. On the other hand, NETCONF is a protocol defined by the IETF that also provides a programmatic interface but only supports XML as its data format. Therefore, the statement that RESTCONF supports JSON and XML while NETCONF supports only XML is true. References: Automating Cisco Enterprise Solutions Official Cert Guide

To construct this URL, one needs to understand REST API call structure and how it relates to Cisco SD-WAN vManage APIs specifically. The base URL starts with ‘https://’, followed by ‘vmanage-ip-address’ which should be replaced with the actual IP address or hostname of vManage. ‘/dataservice/’ is a common prefix in all vManage REST API calls indicating that data service is being accessed. Following this, ‘/device/bfd/sessions/history’ specifies that we are interested in accessing historical data about Bidirectional Forwarding Detection sessions on devices. Finally, ‘?deviceId=’ is a query parameter where one must provide an actual device ID instead of ‘ ’ placeholder. References: ( Automating Cisco Enterprise Solutions Official Cert Guide )

https://vmanage-ip-address/dataservice/device/bfd/synced/sessions?deviceId=deviceId

Table Description automatically generated with medium confidence

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

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 )

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 module name that corresponds to the YANG model referenced in the RESTCONF GET request is “ietf-interfaces:interfaces”. This can be determined by looking at the first line of the response in the exhibit, which shows "ietf-interfaces:interfaces": {. This line indicates that the data returned is part of a list defined within the ‘ietf-interfaces’ YANG module and specifically within the ‘interfaces’ container. References: (Automating Cisco Enterprise Solutions Official Cert Guide)

 To remove a device from the network ‘ENAUTO’ using Meraki APIs, the engineer must send an HTTP DELETE request to the Meraki API endpoint for device removal. The correct line of code to be added should specify the DELETE method, the URL for the API endpoint, and include headers that typically contain authentication information. Option B is correct because it uses requests.request('DELETE', url, headers=headers) which specifies the DELETE method and includes both the URL and necessary headers. References: Automating Cisco Enterprise Solutions Official Cert 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 )

This API endpoint is used to retrieve detailed information about issues detected by Cisco DNA Center, including the impacted hosts and suggested actions for resolution. It provides a comprehensive view of the network issues, which is essential for troubleshooting.

References: The ENAUTO certification emphasizes the importance of understanding APIs and their role in network automation and programmability

 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 )

In Cisco DNA Center Operational Tool API, the Command Runner section of the intent API is designed to retrieve keywords accepted by CLI and enables execution of read-only commands on network devices. This feature allows administrators to retrieve real-time configuration data from devices without making any changes, aiding in monitoring and troubleshooting tasks. References: Automating Cisco Enterprise Solutions Official Cert Guide

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)