Which protocol enables block-level storage access over IP networks?

Which protocol enables block-level storage access over IP networks?

• A. FCP
• B. iSCSI
• C. NFS
• D. SMB

Answer: (B)

Block-level storage access over an IP network is achieved by carrying SCSI commands over TCP/IP with the iSCSI protocol. This setup lets a hosting system see a remote storage target as a raw disk device, which can be partitioned, formatted, and used just like a local drive. Fibre Channel Protocol is designed for Fibre Channel networks and isn’t IP-based. File-level protocols like NFS and SMB expose files and directories rather than raw blocks, so they don’t provide block-level access. iSCSI typically runs over TCP (commonly on port 3260) and is specifically designed to enable SANs over IP networks.

Block-level storage access over an IP network is achieved by carrying SCSI commands over TCP/IP with the iSCSI protocol. This setup lets a hosting system see a remote storage target as a raw disk device, which can be partitioned, formatted, and used just like a local drive. Fibre Channel Protocol is designed for Fibre Channel networks and isn’t IP-based. File-level protocols like NFS and SMB expose files and directories rather than raw blocks, so they don’t provide block-level access. iSCSI typically runs over TCP (commonly on port 3260) and is specifically designed to enable SANs over IP networks.