Organizations that haven't yet implemented any kind of networked storage, or have implemented only NAS, would see a lot of sense in maintaining a common networking infrastructure to server their file-based and block-based data. For them, iSCSI offers an excellent value proposition. For other large enterprises, who have already implemented FC SANs in their datacenters, it would co-exist with the FC SANs and complement them. An organization like a bank may choose to run its core banking applications on FC SAN and run all mid-sized and smaller databases on iSCSI. Almost all organizations would see value in an iSCSI SAN as it helps achieve tremendous RoI. The complexity of implementing an FC SAN makes it an extremely expensive proposition. That is the reason why in spite of its great benefits FC has been limited to datacenters. iSCSI attempts to solve many of these problems. It leverages on two standard protocols-SCSI and IP-to create another standards-based protocol. The iSCSI protocol has been ratified by the IETF as a standard and therefore it attempts to eliminate all compatibility issues.