350-601 Automation Practice Question
When using Cisco NSO (Network Services Orchestrator) to automate service creation across a data center network, what is a key consideration regarding device compatibility?
⚠ Common exam trap
It's easy for candidates to assume NSO relies exclusively on NETCONF or YANG for all devices, overlooking the critical role of OS-version-specific NEDs in enabling multi-protocol, multi-vendor automation.
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
✓
Each device must have a corresponding NED that matches its OS version.
B is correct because Cisco NSO uses Network Element Drivers (NEDs) to translate service models into device-specific CLI, SNMP, or NETCONF commands. Each NED is tied to a specific device OS version (e.g., IOS-XE 16.12, NX-OS 9.3), so mismatched NEDs cause configuration failures or incomplete deployments. Without a compatible NED, NSO cannot communicate with or configure the device.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NSO requires NETCONF for all devices.
Why it's wrong here
NSO supports multiple protocols (CLI, SNMP, NETCONF) depending on NED.
- ✓
Each device must have a corresponding NED that matches its OS version.
Why this is correct
NSO requires a compatible NED for each device model and OS version to translate service models.
- ✗
Device YANG models must be hand-coded by the team.
Why it's wrong here
NSO provides existing NEDs; custom YANG is not required but possible.
- ✗
NSO only supports Cisco devices.
Why it's wrong here
NSO supports multi-vendor via NEDs.
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