350-701 Question #404: Real Exam Question with Answer & Explanation

Question

What are two functionalities of SDN Northbound APIs? (Choose two.)

Options

• ANorthbound APIs provide a programmable interface for applications to dynamically configure
• BNorthbound APIs form the interface between the SDN controller and business applications.
• COpenFlow is a standardized northbound API protocol.
• DNorthbound APIs use the NETCONF protocol to communicate with applications.
• ENorthbound APIs form the interface between the SDN controller and the network switches or

Explanation

SDN Northbound APIs provide a programmable interface for applications to dynamically configure network resources and form the interface between the SDN controller and business applications.

Common mistakes.

• C. OpenFlow is primarily a Southbound API protocol, used for communication between the SDN controller and the network data plane (switches/routers), not Northbound.
• D. While NETCONF can be used in network management, Northbound APIs are often RESTful or other application-level interfaces and are not exclusively or primarily defined by the NETCONF protocol.
• E. This describes the function of Southbound APIs, which facilitate communication between the SDN controller and the underlying network switches or data plane elements.

Concept tested. SDN Northbound API functions

Reference. https://www.cisco.com/c/en/us/solutions/data-center-virtualization/software-defined-networking-sdn/what-is-sdn.html

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