This layer defines the physical interface, media, and transmission of bits. The FC transmission can use both electrical and optical media. Supported data rates include 1, 2, 4, 8, 16, 32, 64. The intention of the Fibre Channel (FC) is to develop practical, inexpensive, yet expendable means of quickly transferring data between workstations, mainframes, supercomputers, desktop computers, storage devices, displays and other peripherials. Bandwidth Between Two Nodes Login, Process Login, Discovery,. Fibre Channel Protocol (FCP) is the transport mechanism responsible for carrying SCSI commands over Fibre Channel networks. FCP was standardized by the T11. FC Potocol defines the communication protocol in five layers: FC-4 Layer: It is the uppermost layer in the FCP stack.