CCIE Automation and Programmability Flashcards

In Ansible, what is the purpose of an 'inventory' file?

Answer: Defining the list of managed hosts and groupings

The Ansible inventory file defines the managed hosts, their groupings, and host/group variables used by playbooks during automation runs.

What is the key difference between RESTCONF and NETCONF?

Answer: RESTCONF uses HTTP/HTTPS with REST principles while NETCONF uses SSH with XML-RPC

RESTCONF uses HTTP/HTTPS with REST operations (GET, PUT, POST, DELETE) while NETCONF uses SSH transport with XML-encoded RPC operations.

In Cisco NSO (Network Services Orchestrator), what is a 'service package' used for?

Answer: Defining reusable network service models that abstract device-specific configuration

NSO service packages define YANG-based service models and mapping logic that translate abstract service inputs into device-specific configurations.

Which Python library provides a higher-level abstraction for SSH-based network device management, supporting multiple vendor CLI?

Answer: netmiko

Netmiko is a Python library built on Paramiko that abstracts SSH connections to network devices, providing vendor-agnostic methods for sending CLI commands.

What is the purpose of Cisco pyATS (Python Automated Test System) in network automation?

Answer: Network test and verification framework with device abstraction

Cisco pyATS is a test framework providing device abstraction (Genie), state comparison, and automated testing for network verification and regression testing.

In YANG modeling, what does the 'list' node type represent?

Answer: A sequence of list entries each identified by key leaf(s)

A YANG 'list' node represents a sequence of list entries (like BGP neighbors or interfaces), each uniquely identified by one or more key leaf values.