Meaning of this HP BL460c Gen9 Specification?

Hello All,

My client order us a HP BL460c Gen9 server with this specification and we could not understand what they meant. Can anyone explain to us:

1. HP Ethernet 10Gb 2-port 560M Adapters 

2. 10Gb 536FLB FlexFabric Adapter 2 Ports per controller

3. 2 x 10GbE, FlexFabric 10 GB, FlexFabric 10/20 GB

What is the difference among these three specs? Are all of them integrated in the BL460 Gen9 servers by default or are they optional and should be bought separately? If you can please try to provide us the part number for each component.

Thanks in advance,