200-901 Network Fundamentals Practice Question
Which THREE of the following are benefits of using an SDN (Software-Defined Networking) architecture compared to traditional networking? (Choose three.)
⚠ Common exam trap
Cisco often tests the misconception that SDN eliminates the need for network engineers entirely, but the correct understanding is that SDN automates tasks and centralizes control, not that it removes the human role in network design and troubleshooting.
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
✓
Automation of network configuration changes.
SDN separates the control plane from the data plane, allowing network administrators to automate configuration changes through a centralized controller (e.g., OpenFlow or Cisco APIC-EM). This eliminates the need for manual, device-by-device CLI changes, reducing human error and enabling rapid, consistent updates across the entire network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reduced need for network engineers.
Why it's wrong here
SDN changes roles but does not eliminate need for engineers.
- ✓
Automation of network configuration changes.
Why this is correct
Programmability allows automated changes via APIs.
- ✓
Faster deployment of new network services.
Why this is correct
Software-based control speeds up service deployment.
- ✓
Centralized control and visibility of the network.
Why this is correct
SDN separates control plane, centralizing decision-making.
- ✗
Built-in encryption for all network traffic.
Why it's wrong here
Encryption is not a built-in SDN feature; it depends on protocols.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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