FIBRE CHANNEL OVER ETHERNET or FCOE.
FCoE provides a lower latency data transfer compared to iSCSI as FCoE does not rely on TCP retransmits.
Jumbo Frames are a prerequisite for FCoE (as a standard FC frame is 2148 Bytes)
FCoE cannot be routed. >> Layer 2 traffic
https://www.rcannings.com/san-storage-fc-vs-fcoe-vs-iscsi/