Types of Hardware for Redundant Zoning in SAN Infrastructure

C.

The correct answer is C. Multiple HBAs.

SAN (Storage Area Network) infrastructure is a specialized high-speed network that connects servers and storage devices to provide block-level access to data storage. A SAN allows multiple servers to access shared storage, which increases storage utilization, enhances storage management, and enables backup and disaster recovery operations.

Zoning is a technique used to create logical subsets of devices within a SAN to isolate and protect different groups of servers and storage resources. Zoning enables the administrator to partition a physical SAN into smaller, more secure zones based on device or application requirements.

To implement zoning in a SAN infrastructure that requires redundancy, multiple HBAs (Host Bus Adapters) should be used. An HBA is a specialized network interface card that connects servers to storage devices in a SAN. Multiple HBAs provide redundant connections between the server and storage devices, which improves fault tolerance and increases performance.

In a SAN infrastructure, redundant HBAs can be used in two ways: Multipathing and Failover. Multipathing provides multiple paths between a server and a storage device, which increases data transfer rates and provides redundancy in case of a link failure. Failover provides an alternative path for data transfer in case of a link failure, ensuring uninterrupted access to storage resources.

Multiple VLANs (A) are not directly related to SAN infrastructure or redundancy. VLANs are used to create virtual networks within a physical network to increase security and manageability. Multiple host nodes (B) are also not directly related to SAN infrastructure or redundancy. Host nodes are servers that connect to a SAN to access shared storage. Multiple routers (D) are not needed to implement zoning in a SAN infrastructure. Routers are used to connect different networks and forward traffic between them.