Which two are southbound APIs? (Choose two.)
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Correct answer: NETCONF, OpenFlow.
Why this is the answer
NETCONF and OpenFlow are southbound APIs. Southbound APIs facilitate communication between a controller and the underlying network devices (e.g., switches, routers) in a Software-Defined Networking (SDN) architecture. NETCONF is a network management protocol that provides a programmatic way to configure and monitor network devices. OpenFlow is a protocol that enables the SDN controller to directly program the forwarding plane of network devices. Thrift and CORBA are remote procedure call (RPC) frameworks, not specifically southbound APIs for SDN. DSC (Desired State Configuration) is a management platform for configuring and maintaining the state of servers, not a southbound API for network devices.
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