SCSI over IP (iSCSI) is a protocol that allows the transmission of SCSI commands over IP networks. This enables storage devices to be accessed over long distances, making it easier to connect servers and storage systems without needing specialized hardware. By using iSCSI, organizations can create a flexible and scalable storage area network (SAN) that leverages existing network infrastructure. This reduces costs and simplifies management, as standard networking equipment can be used to connect storage resources, enhancing overall efficiency in data storage and retrieval.