storage nodes, administrators are able to limit the login process of each host to the most appropriate subset of targets registered with the iSNS, which allows the storage network to scale by reducing the number of unnecessary logins and by limiting the amount of time each host spends establishing login relationships. Each target is able to use login control to delegate their access control and authorization policies to an iSNS server. Such delegation is intended to promote centralized management. State-change notification The state-change notification (SCN) service allows an iSNS server to issue notifications about each event that affects storage nodes on the managed network. Each iSNS client may register for notifications on behalf of its storage nodes, and each client is expected to respond according to its own requirements and implementation. Bidirectional mappings between Fibre Channel and iSCSI devices Because the iSNS database stores naming and discovery information about both Fibre Channel and iSCSI devices, iSNS servers are able to store mappings of Fibre Channel devices to proxy iSCSI device images on the IP network. These mappings may also be made in the opposite direction, allowing iSNS servers to store mappings from iSCSI devices to proxy World Wide Names (WWNs). References External links iSNS for Linux iSNS in OpenSolaris iSNS support in Solaris 10 ISNS in Windows Computer storage buses Network protocols Storage area networks Fibre Channel