Which two parameters are required for a manual system backup? (Choose two.)

The Backup Scheduler is required because it defines which server components and features are included in the backup job and provides the mechanism to trigger a manual backup run on demand.

'Backup Device Configured' as a standalone parameter is not independently required - the device configuration is encompassed within the SFTP server setup, which is captured more precisely by the SFTP server IP address in choice C.

The SFTP server IP address is required because CUCM DRS writes all backup files to an external SFTP server - without this network destination specified, the backup has nowhere to be stored.

A DNS server IP address is not required for CUCM manual backups, as the DRS process communicates directly with the SFTP server by IP and does not depend on DNS resolution.

An NTP server IP address is not a required parameter for initiating a manual backup - NTP affects overall system time accuracy but plays no role in the backup job configuration itself.