sfp/sfp+/qsfp are just the connector types, and can terminate cables that are made of copper or fiber. This is a separate issue from what protocol (ethernet/in

sfp/sfp+/qsfp are just the connector types, and can terminate cables that are made of copper or fiber. This is a separate issue from what protocol (ethernet/infiniband/etc) is running over that cable. For an example, take a look at Mellanox's cable page which lists a large number of combinations of connectors and cable types. So in general, to call a random sfp cable/port an ethernet port would be confusing unless both parties already knew it was passing ethernet traffic. http://www.mellanox.com/page/cables http://www.mellanox.com/page/cables