QSFP+ has a size of 18mm x 72mm, while QSFP28 has a size of 18mm x 84mm. QSFP+ (Quad Small Form-Factor Pluggable) and QSFP28 (Quad Small Form-Factor Pluggable 28) are both form factors for transceiver modules used in high-speed data communication. The FS® 100GBASE Quad Small Form-Factor Pluggable (QSFP28) portfolio offers customers a wide variety of high-density and low-power 100 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider. This guide provides the definitive roadmap for selecting, deploying, and troubleshooting QSFP28 transceivers while bypassing the painful trial-and-error phase. The dimensions are standardized by industry specifications to ensure compatibility and interoperability between different vendors' products. The QSFP28 SR4 transceiver is a high-performing module for SR optical links over OM4 MMF, and is ideal for short-range, multi-lane data communication, a d interconnects applications.
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