An engineer must change the network settings for SIP on a TC endpoint Which API command must be used.

xPreference is not a recognized command in the Cisco TC/CE endpoint API command set.

On Cisco TC and CE endpoints, xConfiguration is the API command namespace used to view and modify persistent configuration values, including network settings, SIP registration details, and other device parameters. Changes made through xConfiguration are stored on the endpoint and survive reboots, making it the correct command for altering network and SIP settings.

xFeedback is used to register the API client to receive event notifications from the endpoint and cannot be used to change configuration settings.

xCommand is used to invoke real-time actions on the endpoint such as placing or ending calls, not to modify stored configuration settings.

xHelp displays documentation and syntax help for the API but does not read or write any configuration values.