An Ethernet standard at 25 gigabits per second (25 GbE). Approved in 2016, 25 GbE was developed by the IEEE 802.3by task force and the 25G Ethernet Consortium, later rebranded as the Ethernet Technology Consortium (ETC). The specification also includes 50 GbE.
The 25 and 50 GbE speeds are even divisions of 100 Gigabit Ethernet, which comprises four 25 Gbps streams. Therefore, migrating from 25 or 50 to 100 GbE is expected to be more economical than going from 40 to 100 GbE. See 100 Gigabit Ethernet
and Terabit Ethernet