An IEEE standard for Gigabit Ethernet over optical fiber and shielded twisted pair (STP). It provides for full-duplex transmission from switch to end station or to another switch and half-duplex over a shared channel using the CSMA/CD access method. 802.3ab is the counterpart standard for Gigabit Ethernet over Category 5 copper wiring. See Gigabit Ethernet.
The IEEE media specifications for Gigabit Ethernet (GbE, or GigE).Those specifications address both multimode (MMF) and single-mode (SMF) optical fiber, core diameter, wavelength, modal bandwidth (MMF), and distance limitations.The specifications are listed in the following table.