Automation

A network engineer needs to automate the backup of running configurations from multiple Cisco IOS XE devices to a central TFTP server. Which tool is best suited for this task in a Python-based automation framework?

An organization uses Cisco DNA Center to automate network provisioning. A network engineer deploys a new access switch but finds that the switch does not receive the intended configuration template. The switch appears in DNA Center inventory with status 'Managed'. What is the most likely cause?

A network team uses Ansible to automate VLAN configuration on Cisco IOS devices. The playbook fails with the error 'Failed to connect to the host via ssh: Permission denied (publickey)'. The control node runs Ubuntu, and the network devices are configured with SSH key authentication. Which solution should the engineer implement?

A company uses Cisco Catalyst Center (formerly DNA Center) for intent-based networking. After upgrading the Catalyst Center appliance, the engineer notices that some devices are unreachable via the network, but the Catalyst Center GUI shows them as 'Managed'. What is the most likely cause?

A network engineer is creating a Python script using the Cisco IOS XE RESTCONF API to configure a loopback interface. The script sends a PUT request to the URI /restconf/data/Cisco-IOS-XE-native:native/interface/Loopback=100 with a JSON body that includes the IP address. The API returns a 201 Created status, but the loopback interface does not appear in the running configuration. What is the most likely issue?

A network engineer uses Netmiko to connect to multiple Cisco IOS XE devices and execute commands. The script runs correctly for most devices but fails for one device with the error: 'ValueError: SSH session not active'. The device is reachable and SSH credentials are correct. What is the most likely cause?

A company uses Chef to automate network device configuration. The network devices are Cisco IOS XE running in a brownfield environment. Which Chef component is used to manage the state of the devices?

A network engineer is troubleshooting an Ansible playbook that uses the ios_config module to apply ACLs. The playbook runs without errors, but the ACLs are not applied to the device. The engineer verifies that the device is reachable and the credentials are correct. What is the most likely cause?

Which TWO statements are true about Cisco DNA Center automation? (Choose two.)

Which THREE attributes are typically included in a YANG module for interface configuration? (Choose three.)

Which THREE are valid methods for automating network device configuration using Cisco IOS XE? (Choose three.)

Refer to the exhibit. A network engineer wants to use Ansible to change the IP address of Loopback100 from 10.1.100.1/24 to 10.1.200.1/24. The playbook uses the ios_config module. The playbook runs successfully, but the IP address remains unchanged. What is the most likely reason?

Refer to the exhibit. A Python script sends the JSON payload shown via a POST request to the RESTCONF URI /restconf/data/ietf-interfaces:interfaces on a Cisco IOS XE device. The API returns 201 Created, but the interface GigabitEthernet1 is not configured. What is the most likely cause?

A company has a large network of 500 Cisco IOS XE routers and switches spread across multiple sites. The network team wants to automate the collection of interface statistics every hour and store them in a central database for historical analysis. The team has a Linux server with Python 3 and access to all devices via SSH with key-based authentication. They have written a Python script using Netmiko to connect to each device, run 'show interfaces', and parse the output to extract key metrics (e.g., input/output errors, packets per second). The script works correctly when tested on a small subset of devices, but when run against all 500 devices, it takes too long (over 2 hours) and sometimes fails due to SSH connection timeouts. The team needs to reduce the execution time and improve reliability. Which approach should they take?

A service provider uses Cisco IOS XE routers with NETCONF/YANG for configuration management. They have a centralized automation system that pushes configuration changes via NETCONF. Recently, after a maintenance window, several routers lost connectivity to the NETCONF server. The automation system can still SSH to the routers and execute CLI commands. The engineer suspects that the NETCONF server's SSH key changed, causing the routers to reject the connection. However, checking the routers' configuration, the engineer finds that the 'netconf ssh' command is present and the SSH server is enabled. The engineer also notices that the routers have an 'ip ssh server algorithm publickey' configuration specifying a list of allowed public keys. What is the most likely cause of the NETCONF connectivity loss?

A network engineer is automating the deployment of VLANs across multiple switches using Ansible. The playbook runs successfully on most switches, but one switch fails with an error indicating that the VLAN configuration command is not recognized. What is the most likely cause?

A DevOps team is implementing a CI/CD pipeline that automates network configuration changes. Which design principle is most important to ensure that a failed deployment does not cause prolonged outages?

A network engineer is troubleshooting an automated configuration change that caused a routing loop. The change was pushed via an Ansible playbook that modified OSPF cost values on multiple routers simultaneously. What is the most likely reason for the loop?

An organization uses Chef to manage network device configurations. A cookbook that configures SNMP community strings is applied to a group of routers. After the run, one router loses SNMP access. The cookbook uses the following resource: snmp_community 'public' do action :remove end. What is the most likely cause of the issue?

Which TWO statements about NETCONF and YANG are true?

Which THREE benefits does network automation provide over manual configuration?

A large enterprise uses a centralized automation platform based on Ansible Tower to manage its network infrastructure. The network consists of 500 Cisco IOS XE routers and switches distributed across multiple sites. The automation team has created a playbook that configures BGP peerings on all devices. The playbook uses the ios_bgp module. Recently, during a maintenance window, the playbook was run against a subset of devices that were supposed to be upgraded to a new IOS XE version. However, after the run, several devices lost their BGP configurations entirely. The team discovers that the new IOS XE version introduced a new BGP configuration model that is not fully compatible with the ios_bgp module's expected CLI commands. The playbook failed silently on those devices, and the existing BGP configuration was removed. The team needs to prevent this from happening in future maintenance windows. Which action should be taken?

A network engineer is automating configuration backups using Ansible. The playbook uses the ios_config module to retrieve running configurations from Cisco IOS XE devices. However, the playbook fails with a timeout error on a specific device. Other devices respond correctly. What is the most likely cause of the failure?

Which TWO statements are true about RESTCONF and NETCONF in a Cisco IOS XE environment? (Choose two.)

Refer to the exhibit. A network engineer sends a RESTCONF PATCH request with the above JSON payload to the URL https://192.168.1.100/restconf/data/ietf-interfaces:interface=GigabitEthernet0/0/0. What is the expected outcome?

Drag and drop the steps for the three-way TCP handshake into the correct order.

Drag and drop the steps to configure an extended access control list (ACL) on a Cisco router in the correct order.

Match each QoS feature to its description.

Match each network automation tool to its purpose.