An IT manager has indicated the need to deploy a feasible standby storage file server that replicates the production data file server and should be quickly accessible from the network by all users…

JBOD (Just a Bunch of Disks) is a simple disk aggregation method with no network sharing capability and no built-in redundancy or replication features.

DAS (Direct Attached Storage) connects physically to a single host server and is not directly accessible to all network users without routing through that host.

NAS devices provide file-level storage over standard network protocols such as SMB/CIFS and NFS, making shared files directly accessible to all network users without requiring special client software or reconfiguration. A NAS unit can replicate a production file server's data and be brought online quickly as a standby replacement, satisfying both the network accessibility and replication requirements described in the scenario.

SAN (Storage Area Network) provides block-level storage and is more complex and expensive to configure - it is not typically deployed as a straightforward standby file server accessible directly by end users.