200-901 Cisco Platforms and Development Practice Question
A developer wants to use Cisco NX-API on a Nexus switch to execute a CLI command via JSON. What must be enabled on the switch first?
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
✓
feature nxapi
The 'feature nxapi' command enables NX-API on NX-OS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
feature nxapi
Why this is correct
NX-API is disabled by default on Nexus switches and must be activated with the command 'feature nxapi' in configuration mode. Enabling this feature starts the HTTP/HTTPS listener that accepts JSON-formatted CLI requests, satisfying the stem's prerequisite.
- ✗
ip http server
Why it's wrong here
Enabling the HTTP server alone does not activate NX-API's JSON interface; the nxapi feature must also be enabled. Plain ip http server is for legacy web access. It would be the right prerequisite when using older REST or web-based management interfaces, not NX-API CLI over JSON.
- ✗
netconf-yang
Why it's wrong here
NETCONF/YANG provides model-driven configuration over SSH, not JSON-encoded CLI execution. NX-API needs the nxapi feature enabled together with an HTTP or HTTPS server. NETCONF-YANG would be correct when the requirement is standards-based configuration using YANG data models rather than sending CLI commands.
- ✗
restconf
Why it's wrong here
RESTCONF is a separate YANG-driven HTTP API; enabling it does not activate NX-API's JSON CLI transport. NX-API requires the nxapi feature with HTTP or HTTPS enabled. RESTCONF would be the right choice when model-driven programmatic configuration via YANG paths is needed, not raw CLI execution.
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