10GBASE-X Ethernet signalling represents a category of Ethernet in the IEEE 802.3ae standards for local area networks (LANs). This technology supports a 10 Gigabit per second (Gbps) data rate. It is primarily used for high-speed network backbones, for instance, in data centres or large enterprise networks. The 'X' in 10GBASE-X signifies that it uses 8B/10B encoding, a line code that maps 8-bit words to 10-bit symbols to achieve DC-balance and bounded disparity, and yet provide enough state changes to allow reasonable clock recovery. This encoding helps to maintain the integrity of the data being sent and received, reducing the likelihood of errors. 10GBASE-X technology can operate over both copper and optical fibre cables. When using fibre cables, it can cover distances up to 40 kilometres depending on the specific standard used (10GBASE-LR, 10GBASE-ER, etc.). For copper cables (10GBASE-CX4), the maximum distance is significantly shorter, typically around 15 metres.