ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
An enterprise is deploying a private cloud and has implemented a software-defined networking (SDN) architecture. The DevOps team needs its automation toolchain to programmatically create and tear down multi-tier network segments on demand, without accessing individual switches or firewalls. Which SDN component or concept enables this orchestration platform to make such high-level requests?
Underlay data-plane fabric built with spine-leaf switches
Southbound protocol (e.g., OpenFlow) between the controller and switches
Northbound API exposed by the SDN controller
East-west interface used for synchronization among distributed controllers
In an SDN architecture, applications and orchestration tools do not speak directly to individual forwarding devices. Instead, they communicate with the centralized SDN controller through a northbound application programming interface (API). The controller translates these intent-based, high-level requests into the low-level instructions that are delivered to switches and other network devices over southbound protocols such as OpenFlow. The southbound interface, east-west interfaces, and underlay fabric are all critical parts of SDN, but none of them provide the abstracted control surface that automation platforms rely on for on-demand network provisioning.
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What is a Northbound API in SDN?
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What is the role of an underlay data-plane fabric in SDN?
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ISC2 Systems Security Certified Practitioner (SSCP)
Network and Communication Security
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