What are the Northbound API connection types for Cisco NSO?

The correct answer highlights the main types of Northbound API connection types utilized by Cisco NSO (Network Services Orchestrator), which allow communication between applications and the orchestration layer.

Focusing on the details:

1. NETCONF: This is a network configuration protocol that provides an interface for managing network devices using XML as the encoding language. It is widely used for network device management and is particularly suitable for operations involving the configuration and status of devices.

2. RESTCONF: This is an HTTP-based protocol that operates on the principles of REST (Representational State Transfer) and allows access to data defined in YANG. RESTCONF provides a more straightforward, web-based way to interact with network devices and services compared to traditional methods.

3. JSON/RPC: This means JSON Remote Procedure Call, which offers a way to execute commands on a service by sending data in JSON format. This method is increasingly popular due to the lightweight nature of JSON.

4. CLI: Command Line Interface interactions are a traditional method of managing devices, providing access at a lower level and allowing for direct commands to the system.

This combination of protocols and methodologies offers a robust framework for integration, control, and management within the Cisco NSO