QSFP28 (Quad Small Form-Factor Pluggable 28) enables 100G transmission by aggregating four parallel 25G electrical lanes, delivering an optimal balance of bandwidth efficiency, power consumption, and deployment flexibility. Compared with legacy 40G QSFP+ modules, QSFP28 provides 2. 5× higher. ggregate data rate of 100GbE. The QSFP28 LR4 module is designed for extended reach and supports links up Vc ersible. Cisco ® QSFP28 100G ZR extends 100GbE coherent links from QSFP28 ports reaching up to 80km over dark fiber and up to 300km over amplified Dense Wave Division Multiplexing (DWDM) links. The Cisco QSFP28 100G ZR module expands the portfolio of digital coherent optics (DCO) modules to connect QSFP28. The abbreviation QSFP28 stands for Quad Small Form-factor Pluggable 28. The name breaks down simply: “Quad” means four lanes, “SFP” refers to the Small Form-factor Pluggable mechanical standard “28” indicates each lane runs at 28 Gbps. With up to 100 Gbps speeds, it is frequently used within data centers, enterprise networks, and telecommunications.
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