Topology and Orchestration Specification for Cloud Applications (TOSCA) is a declarative syntax that CSPs use to describe a topology of cloud based web services, their components, relationships, and the processes that manage them. CSPs describe the connection points, the logical links between the connection points, and the policies such as affinity and security in a TOSCA template. CSPs then upload the template to AWS TNB which synthesizes the resources needed to establish a functioning 5G network across AWS Availability Zones.
