This standard consists of distinct Fibre Channel mappings resulting in the following models: ?C FC-BB_IP (FC over TCP/IP backbone network) ?C Transparent FC-BB consisting of: ?C FC-BB_GFPT (FC over SONET/SDH/OTN/PDH backbone network using GFPT adaptation) ?C FC-BB_PW (FC over MPLS network using PW adaptation) ?C FC-BB_E (FC over Ethernet)