2.5 gigabit Ethernet (2.5GbE)
The 2.5GbE and 5GbE Gigabit Ethernet variants developed by the NBase-T Alliance have been standardized by IEEE under 802.3bz. These two variants fill the conceptual gap between Gigabit Ethernet (1GbE) with a data rate of 1 Gbps and 10GbE with 10 Gbps. They are ideal for transmission to access points( AP) in accordance with 802.11ac, since the data rate of 1GbE is not sufficient for this. Both variants are based on twisted-pair cables.
2.5GbE has a data rate of 2.5 Gbit/s, a spectral bandwidth of 100 MHz and transmits the data on 2.5GBase-T via a UTP cable ofcategoryCat 5e or higher. The cable length can be 100m. The physical layer technology is based on 10GBase-T, with the data rate of 10GbE reduced to a quarter with 10 Gbit/s.