Dell 2550 wont install network card

[Paulo Henrique Baptista de Oliveira]

        Hi all,
        I want to install a Dell PowerEdge 2550 Rack Server that comes with 2
10/100 Mbps/ network cards and 1 1 Gbp/s network card.
        I'm in lost to get those 10/100 network cards to run.
        Are they Intel Ethernet Express 100? What driver can I use?
        Anyone has such machine?
        TIA,            Paulo Henrique