The HPE Alletra dHCI solution uses the iSCSI protocol for data access between the storage and compute layers. iSCSI is a network protocol that enables the transport of SCSI commands over IP networks, allowing for efficient and scalable storage networking. This protocol is commonly used in hyper-converged and disaggregated hyper-converged infrastructure (dHCI) environments, providing flexibility and ease of integration. References: * HPE Alletra dHCI Overview * HPE iSCSI Solutions