There are total of 4 Gigabit Ethernet ports available on the TEG-424WS. 2 ports are dedicated for copper Gigabit Ethernet connectivity. The other two available ports are shared by two pairs of copper Gigabit Ethernet port and Mini GBIC slot. Therefore you can either have 4 copper Gigabit Ethernet ports or 2 copper Gigabit Ether ports and 2 Mini GBIC slots.