- The IEEE 802.3cu standard, 100 Gb/s and 400 Gb/s operation over single-mode fiber at 100 Gb/s per wavelength, has been published. The new standard is designed to support more cost-effective and energy-efficient single-mode fiber interfaces for creating 100 Gigabit per second (Gb/s) and 400 Gb/s Ethernet networks using 100 Gb/s optical technology to reduce cost and increase density. - The IEEE P802.3ck standard, 100 Gb/s, 200 Gb/s, and 400 Gb/s Electrical Interfaces Based on 100 Gb/s Signaling, has moved to the working group voting phase. This standard, once completed, aims to enable 100 Gb/s electrical interfaces and support the development of higher-density or lower-cost electrical interfaces for 100, 200, or 400 Gb/s Ethernet. The IEEE P802.3ct standard, 100 Gb/s Operation over DWDM (Dense Wavelength Division Multiplexing) Systems , is complete and in final review before publication. This standard is significant as it is the first Ethernet specification for coherent DWDM technology that supports 100 Gb/s connectivity over lengths of at least 80 kilometers. The IEEE P802.3cw standard, 400 Gb/s Operation over DWDM (Dense Wavelength Division Multiplexing) Systems, still under development, extends the Ethernet specification for coherent DWDM technology to 400 Gb/s. The IEEE 802.3 Ethernet Beyond 400 Gb/s Study Group is exploring the objectives for launching a new IEEE project to standardize capabilities beyond the current maximum Ethernet data rate of 400 Gb/s. Market potential and economic and technical feasibility are among the issues the study group is considering.