Which storage type provides block-level storage?

Which storage type provides block-level storage?

• A. SAN
• B. NAS
• C. DAS
• D. SATA

Answer: (A)

Block-level storage means the storage presents raw blocks to the host, so the operating system can format and manage its own filesystem on those blocks. A Storage Area Network is built to deliver exactly that kind of access over a network, using protocols like Fibre Channel or iSCSI to present LUNs as block devices to servers. That’s why SAN is the best fit for block-level storage. In contrast, NAS provides file-level storage; clients access shared files over network file protocols (like NFS or SMB). Direct-attached storage is storage directly connected to a single server (not over a network), and SATA is just an interface for drives rather than a storage type itself.

Block-level storage means the storage presents raw blocks to the host, so the operating system can format and manage its own filesystem on those blocks. A Storage Area Network is built to deliver exactly that kind of access over a network, using protocols like Fibre Channel or iSCSI to present LUNs as block devices to servers. That’s why SAN is the best fit for block-level storage.

In contrast, NAS provides file-level storage; clients access shared files over network file protocols (like NFS or SMB). Direct-attached storage is storage directly connected to a single server (not over a network), and SATA is just an interface for drives rather than a storage type itself.