200-901 Network Fundamentals Practice Question
In the context of SDN, which API allows a network controller to communicate with the forwarding plane of network devices?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Southbound API
Southbound APIs (e.g., OpenFlow, NETCONF, gRPC) enable communication from the controller to the network devices.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Eastbound API
Why it's wrong here
Eastbound APIs are for controller-to-controller communication.
- ✗
Northbound API
Why it's wrong here
Northbound API enables applications to talk to the controller.
- ✗
REST API
Why it's wrong here
REST can be used for northbound; not specific to device communication.
- ✓
Southbound API
Why this is correct
Southbound API controls data plane devices.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.