An engineer is responsible for several thousand network devices across many campus environments that are all connected to a common controller. Which action updates all devices with new security settin

Using CLI to change settings on individual devices does not scale to thousands of devices and requires manual intervention for each one.

Tracking devices on a spreadsheet is a manual and error-prone method that can be incomplete or outdated, and individual CLI-based configuration cannot scale across thousands of devices.

Getting the device list from the controller ensures the inventory is accurate and authoritative, unlike a manually maintained spreadsheet. RESTCONF is a REST-based protocol that leverages YANG data models to configure network devices programmatically over HTTP. Together, they allow a single automated operation to push updated security settings to all devices managed by the controller simultaneously.

Tracking devices on a spreadsheet bypasses the controller's authoritative inventory and introduces manual maintenance overhead that defeats the purpose of centralized management.