Which of the following storage technologies is IP-based?

iSCSI (Internet SCSI) carries SCSI block storage commands over standard TCP/IP networks, making it natively IP-based. This allows organizations to deploy block-level SAN storage over existing Ethernet infrastructure without dedicated Fibre Channel hardware. The answer choice referencing SCSI in this context refers to the iSCSI variant as the IP-based storage protocol.

DAS (Direct Attached Storage) connects storage directly to a host via interfaces such as SATA or SAS and does not use an IP network.

FCP (Fibre Channel Protocol) transports SCSI commands over Fibre Channel networks, which is a separate fabric technology and not IP-based.

NAS (Network Attached Storage) is a file-level storage architecture that operates over IP, but it is not the block-level IP storage protocol the question targets.