A network architect designs the iSCSI-based storage area network solution. The iSCSI datastore must be designed with high availability, minimal downtime, and no single point of failure. The requiremen

Hardware-based flow control is used to prevent packet loss in congested network segments, but it does not provide failover for storage paths based on SCSI sense codes or address the high availability requirements for the storage array.

Port security is a network security feature that limits MAC addresses on a switch port to prevent unauthorized access and does not contribute to storage I/O failover or high availability based on SCSI sense codes.

iSCSI multipathing solutions, typically implemented using MPIO (Multipath I/O), are specifically designed to provide high availability and failover for storage I/O by utilizing multiple network paths to the iSCSI storage array. Multipathing software can detect path failures, including those indicated by SCSI sense codes from the storage target, and transparently redirect I/O to an alternate, healthy path, ensuring minimal downtime and eliminating single points of failure without solely depending on network layer fault detection.

NIC teaming (or link aggregation) groups multiple physical network interfaces for network path redundancy and load balancing at the network layer, but it does not interpret SCSI sense codes for intelligent storage I/O path failover; it primarily responds to network link failures.