Which protocol is used to encapsulate Fibre Channel frames, enabling them to be transmitted over Ethernet networks?

FCoE (Fibre Channel over Ethernet, defined in T11 FC-BB-5) encapsulates Fibre Channel frames directly within Ethernet frames using EtherType 0x8906, enabling FC traffic to traverse standard 10GbE or faster Ethernet networks. This allows organizations to converge storage and data networking onto a single physical infrastructure while preserving the FC protocol stack end-to-end.

DCB (Data Center Bridging) is a set of IEEE extensions that provide the lossless Ethernet transport required by FCoE - such as Priority Flow Control - but DCB itself does not encapsulate or carry FC frames.

SCSI is a parallel interface standard for connecting storage devices and is a separate protocol from Fibre Channel; iSCSI encapsulates SCSI commands over TCP/IP, not FC frames over Ethernet.

Ethernet SAN is a general marketing term describing SANs that use Ethernet infrastructure, not a specific encapsulation protocol or standard.