The Gigalight QSFP28 to 4x SFP28 breakout Active fiber optic cable provides technology professionals with a cost-effective connectivity solution for combining 100G QSFP28 and 25G SFP28-enabled switches, switches and servers. For common applications, users can install this split fiber cable between the QSFP28 port available on the switch with a speed of 100Gbps and connect up to four SFP28 switches that support 25GbE speeds up. Each QSFP28-SFP28 split optic cable has one QSFP28 (SFF-8436) header for 100Gbps and four SFP28 (SFF-8431) connectors for 25Gb/s each.