+ * @brief Sets NTP server.
+ * @since_tizen 8.0
+ * @param[in] connection The connection handle
+ * @param[in] ntp_server requested NTP server IP/URL
+ * @return 0 on success, otherwise a negative error value
+ * @retval #CONNECTION_ERROR_NONE Successful
+ * @retval #CONNECTION_ERROR_INVALID_OPERATION Invalid operation
+ * @retval #CONNECTION_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #CONNECTION_ERROR_PERMISSION_DENIED Permission denied
+ * @retval #CONNECTION_ERROR_NOT_SUPPORTED Not supported
+ */
+int connection_set_ntp_server(connection_h connection, const char *ntp_server);
+
+/**
+ * @brief Get NTP server url.
+ * @since_tizen 8.0
+ * @remarks You must release @a ntp_server using free().
+ * @param[in] connection The connection handle
+ * @param[out] ntp_server The IP/URL of NTP Server
+ * @return 0 on success, otherwise a negative error value
+ * @retval #CONNECTION_ERROR_NONE Successful
+ * @retval #CONNECTION_ERROR_INVALID_OPERATION Invalid operation
+ * @retval #CONNECTION_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #CONNECTION_ERROR_PERMISSION_DENIED Permission denied
+ * @retval #CONNECTION_ERROR_NOT_SUPPORTED Not supported
+ */
+int connection_get_ntp_server(connection_h connection, char **ntp_server);
+
+/**
+ * @brief Clear NTP server.
+ * @since_tizen 8.0
+ * @param[in] connection The connection handle
+ * @return 0 on success, otherwise a negative error value
+ * @retval #CONNECTION_ERROR_NONE Successful
+ * @retval #CONNECTION_ERROR_INVALID_OPERATION Invalid operation
+ * @retval #CONNECTION_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #CONNECTION_ERROR_PERMISSION_DENIED Permission denied
+ * @retval #CONNECTION_ERROR_NOT_SUPPORTED Not supported
+ */
+int connection_clear_ntp_server(connection_h connection);
+
+/**