Compared with 10G, 25G can provide the network foundation for the existing 100G (4*25Gbps), the upcoming 400G (8*50Gbps) and the future 800G Ethernet, so operators prefer to use 25G and 100G inadvance to have a better transition to the 400G. Therefore, the rapid development of 400G will also promote the development of 25G and 100G markets to a certain extent.
