Which two options are examples of Northbound and/or Southbound protocol?(Choose two)

OpenStack is an open-source suite of cloud computing software, not a network protocol.

ISIS (Intermediate System to Intermediate System) is an interior gateway protocol (IGP) used for routing within an autonomous system, not classified as a northbound or southbound protocol in the SDN context.

NETCONF (Network Configuration Protocol) is a standardized southbound protocol used by network management systems to install, manipulate, and delete configurations of network devices.

JSON (JavaScript Object Notation) is a data-interchange format, not a network protocol itself, although it is often used as a payload format by various network protocols.

BGP-LS (Border Gateway Protocol - Link State) is a southbound protocol extension that allows BGP to carry link-state information, including network topology and traffic engineering attributes, to software-defined networking (SDN) controllers or path computation engines.