See pictures for more details

I/O ports and slots
 -48 RJ-45 autosensing 10/100/1000 ports (IEEE 802.3 type 10BASE-T, IEEE 802.3u type 100BASE-TX, IEEE 802.3ab type 1000BASE-T)
 -Duplex: 10BASE-T/100BASE-TX: Half or full
 -1000BASE-T: Full only
 -4 fixed GbE SFP ports