iFCP uses the Fibre Channel protocol and transports it over a TCP/IP network. iFCP allows for the possibility that an entity on an IP network could directly work with storage payloads. iFCP does not use a FC switch but bypasses it for IP switches instead.
FCIP takes FC frames and tunnels them through an IP network. It uses E-port connections on FC switches that connect to gateways to build distributed fabrics by transporting switch-to-switch communications.
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This was first published in March 2002