Final answer:
RESTCONF and OnePK are considered SBIs (Service-Based Interfaces), as they provide interfaces that allow communication between software components in a network. OSGi and OpFlex are not typically classified as SBIs.
Step-by-step explanation:
The question pertains to identifying which of the listed options are Service-Based Interfaces (SBIs). SBIs are a type of interface used for communication between different software components in a service-oriented architecture. Out of the options provided:
- RESTCONF is a network management protocol that uses HTTP methods for CRUD (Create, Read, Update, Delete) operations on data defined in YANG, making it an SBI.
- OSGi (Open Service Gateway initiative) is a framework for modular software development in Java, but it is not typically classified as an SBI.
- OnePK (One Platform Kit) was a set of APIs provided by Cisco for network programming which can be considered an SBI because it exposes services for applications to interact with network devices.
- OpFlex is a communications protocol for the southbound interface in a network controller but does not fit the typical definition of an SBI as it is more protocol-oriented for SDN (Software Defined Networking) environments.
Therefore, RESTCONF and OnePK would be considered SBIs out of the options provided.