What Does 1000BASE-X Mean?
1000BASE-X is a group of standards for Ethernet physical layer standards, specified within the IEEE 802.3.z standard.
It is used for gigabit Ethernet connections that transmit data mainly over fiber optic cable, and sometimes over copper-shielded cable.
Techopedia Explains 1000BASE-X
1000BASE-X consists of various standards. These include:
1000BASE-LX (both for single- and multi-mode fiber)
The range of 1000BASE-X starts at 25 meters for copper and can be extended to 70 km with a single-mode fiber channel. All of these standards use an 8b/10b encoding scheme, in which 8 bits are used for data transmission and 2 for error correction.