Which statement is true about SAN protocols?

• A. SAN provides block-level access via iSCSI or Fibre Channel.
• B. NAS provides block-level access via iSCSI or Fibre Channel.
• C. SAN uses file-level access via NFS/SMB.
• D. They are the same as NAS.

Answer: (A)

Block-level storage access is what SANs provide. They present raw storage devices (LUNs) to servers, allowing the host to manage its own file system. This is achieved with common SAN protocols like Fibre Channel, which uses a dedicated storage fabric, and iSCSI, which tunnels SCSI commands over IP networks to carry block storage over Ethernet. In contrast, NAS serves file-level access using protocols such as NFS or SMB, where clients interact with files and directories rather than raw disks. So the statement that SAN provides block-level access via iSCSI or Fibre Channel is correct. It wouldn’t fit to say SAN offers file-level access or that SAN is the same as NAS.