The 100G QSFP28 to 25G SFP28 high-speed cable is applied to the 100G (100GBASE-SR4) to 4-way 25G (25GBASE-SR) Ethernet branch link in data centers, and is 100% perfectly compatible with a full range of branded servers, switches, routers, PDH/SDH transmission equipment, EPON, GPON, WDM PON base stations, and other equipment. It has the advantages of high reliability, low cost, and low power consumption.