200-301 · Question #516
Which type of API allows SDN controllers to dynamically make changes to the network?
The correct answer is D. southbound API. Southbound APIs enable SDN controllers to communicate with and dynamically program the underlying network devices, pushing forwarding rules and configurations.
Question
Which type of API allows SDN controllers to dynamically make changes to the network?
Options
- Anorthbound API
- BREST API
- CSOAP API
- Dsouthbound API
How the community answered
(23 responses)- B4% (1)
- C4% (1)
- D91% (21)
Why each option
Southbound APIs enable SDN controllers to communicate with and dynamically program the underlying network devices, pushing forwarding rules and configurations.
Northbound APIs are used by applications and orchestration systems to communicate with the SDN controller, requesting network services or policy changes, rather than the controller using them to interact with devices.
REST API is an architectural style for APIs (Representational State Transfer), describing *how* an API is built and interacts, not its functional direction (northbound or southbound) within the SDN architecture.
SOAP API is another architectural style for APIs (Simple Object Access Protocol), similar to REST, and describes *how* an API is built, not its functional direction within the SDN architecture.
Southbound APIs are used by the SDN controller to communicate with and control the data plane devices (switches, routers), allowing it to dynamically push configurations, policies, and forwarding rules to the network hardware.
Concept tested: SDN API types and functions
Source: https://learn.microsoft.com/en-us/azure/architecture/guide/networking/sdn-architecture
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