Which storage type provides high-speed block-level storage accessible to servers in data centers?

Which storage type provides high-speed block-level storage accessible to servers in data centers?

• A. DAS
• B. NAS
• C. Cloud storage (block-level)
• D. SAN

Answer: (D)

Block-level storage accessible to servers in a data center is provided by a Storage Area Network. In this setup, storage is presented to hosts as raw blocks, which the servers format with their own filesystem and manage at the OS level. A SAN uses a dedicated, high-speed network (often Fibre Channel or iSCSI over Ethernet) to connect many servers to a shared pool of disks, delivering low latency and high IOPS for demanding workloads like databases and virtual machines. This centralized, networked approach contrasts with direct-attached storage, which is tied to a single server, and NAS, which serves file-level access over the network. Cloud block storage exists, but SAN is specifically built to deliver fast, block-level performance within the data center environment.

Block-level storage accessible to servers in a data center is provided by a Storage Area Network. In this setup, storage is presented to hosts as raw blocks, which the servers format with their own filesystem and manage at the OS level. A SAN uses a dedicated, high-speed network (often Fibre Channel or iSCSI over Ethernet) to connect many servers to a shared pool of disks, delivering low latency and high IOPS for demanding workloads like databases and virtual machines. This centralized, networked approach contrasts with direct-attached storage, which is tied to a single server, and NAS, which serves file-level access over the network. Cloud block storage exists, but SAN is specifically built to deliver fast, block-level performance within the data center environment.