Which protocol is the foundation for unified fabric as implemented in Cisco NX-OS?

A.
Fibre Channel

B.
Data Center Bridging

C.
Fibre Channel over Ethernet

D.
N proxy virtualization

E.
N Port identifier virtualization

Explanation:
Fibre Channel over Ethernet (FCoE) is one of the major components of a Unified Fabric. FCoE is a
new technology developed by Cisco that is standardized in the Fibre Channel Backbone 5 (FC-BB-5)
working group of Technical Committee T11 of the International Committee for Information
Technology Standards (INCITS). Most large data centers have huge installed bases of Fibre Channel
and want a technology that maintains the Fibre Channel model. FCoE assumes a lossless Ethernet, in
which frames are never dropped (as in Fibre Channel) and that therefore does not use IP and TCP.

http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5000-seriesswitches/white_paper_c11-495142.html