Fast Ethernet
![Intel PRO/100 Fast Ethernet NIC, a PCI card](/Images/godic/202501/12/Intel_Pro-100_82558_PCI_NIC3120.jpg")
![3Com 3c905-TX 100BASE-TX PCI network interface card](/Images/godic/202501/12/3Com_3c905-tx_NIC3120.jpg")
In computer networking, Fast Ethernet is a collective term for a number of Ethernet standards that carry traffic at the nominal rate of 100 Mbit/s (the original Ethernet speed was 10 Mbit/s). Of the Fast Ethernet standards, 100BASE-TX is by far the most common.