Terms associated with N_Port ID Virtualized (NPIV) Storage:
Fabric ID: A unique numeric identifier of the SAN repository.
LUN: Logic Unit Number. A unique number used to identify a logical unit on the disk storage. The value can be between 0 and 254.
Target ID: The port number of the storage disk provided by the SAN vendor.
WWN: World Wide Name. An 8-byte number used as a unique identifier in a Fibre Channel or Serial Attached SCSI storage network. The first 16 digits represent the WWPN; the last 16 digits represent the WWNN.
WWNN: World Wide Node Name. A 16-digit World Wide Name assigned to a node (an endpoint or a device) in a Fibre Channel fabric or Serial Attached SCSI storage network.
WWPN: World Wide Port Name. A16-digit World Wide Name assigned to a port in a Fibre Channel fabric or Serial Attached SCSI storage network.