Comparing 10BaseT, FastEthernet, and Gigabit Ethernet

Comparing 10BaseT, FastEthernet, and Gigabit Ethernet
There are some major differences between FastEthernet and Gigabit Ethernet. FastEthernet uses
the MII, and Gigabit uses the gigabit media independent interface (GMII). 10BaseT used the
AUI. A new interface was designed to help FastEthernet scale to 100Mbps, and this interface
was redesigned for Gigabit Ethernet. The GMII uses an eight-bit data path instead of the fourbit
path that FastEthernet MII uses. The clocking must operate at 125MHz to achieve the
1Gbps data rate.