Which statement about Network Services Orchestrator (NSO) is true?

NSO is used in various environments, including enterprise and data center networks, not exclusively service provider environments.

While XML is a serialization format used by NSO, it is not the only one, and NSO primarily leverages YANG for modeling, not exclusively XML for coding.

Cisco NSO is built upon the YANG modeling language, which provides a standard, text-based way to model configuration and state data for network devices. This allows NSO to manage a wide variety of network devices from different vendors using a single, consistent interface for automation.

NSO can integrate with SDN solutions but does not inherently require SDN as an overlay for its core automation and orchestration functions.