Which of the following storage technologies is IP-based?

iSCSI (Internet Small Computer System Interface) utilizes the SCSI command set and encapsulates it within TCP/IP packets, allowing block-level storage to be accessed over standard Ethernet networks, making it an IP-based storage technology.

DAS (Direct Attached Storage) connects directly to a server and does not use any network protocol, including IP, for data access.

FCP (Fibre Channel Protocol) is used in Fibre Channel networks, which operate over a dedicated fabric and are not IP-based.

NAS (Network Attached Storage) is a system that provides file-level access over IP-based protocols like SMB or NFS, but the question may be seeking a specific block-level storage protocol like iSCSI rather than a complete storage system.