QSFP28 is a standard designed to carry 100G Ethernet, 32 Fibre Channel, or EDR InfiniBand. QSFP28 or quad small form-factor pluggable allows four times the speed of corresponding SFP (25Gbit/s).
It quickly became the main network transceiver for 100G networks, due to many advantages like high port density, low cost, and low power consumption. QSFP28 is often referred to as 100G SFP or QSFP100. VCHUNG offers a variety of QSFP28 with different physical layers like 100GBASE-ER4.