Which of the following tape drive features allows multiple devices to be backed up simultaneously?

Compression reduces the size of data to be stored, increasing capacity and sometimes throughput, but does not allow multiple devices to be backed up simultaneously.

Shoe-shining refers to the undesirable behavior of a tape drive frequently starting and stopping because the data stream is too slow, not a feature for simultaneous backups.

Multi-streaming typically refers to a backup software feature where multiple data streams are sent to either multiple tape drives or sequentially to a single tape drive, but not simultaneously interleaved onto one tape drive like multiplexing does.

Multiplexing allows data from multiple backup jobs or devices to be interleaved and written to a single tape drive simultaneously, maximizing tape drive utilization. This is especially useful when individual backup jobs cannot stream data fast enough to keep the tape drive busy, preventing shoe-shining.