Which product provides network controller-level management features?

An engineer must configure Cisco Nexus devices and wants to automate this workflow. The engineer enables the Cisco NX-OS REST API to configure the devices by using an Ansible playbook. Before running the code, which resource must be used to verify that the code works correctly?

Which network device monitors incoming and outgoing traffic and decides whether to allow or block specific traffic based on a defined set of rules?

Which platform has an API that be used to obtain a list of vulnerable software on user devices?

Which two encoding formats do YANG interfaces support?