QSFP-DD is a new module and cage/connector system similar to current QSFP, but with an additional row of contacts providing for an eight lane electrical interface. It is being developed by the QSFP-DD MSA as a key part of the industry's effort to enable high-speed. The Master Reference Matrix: SFP vs. QSFP Standards (2025 Edition) This table consolidates specifications from over 20 different MSA documents into a single, actionable view. Pro Tip: In 2025, QSFP112 is gaining traction as a bridge technology. It allows 400G speeds in a native 4-lane. FS 400G QSFP-DD module solutions featuring high-performance, high-bandwidth, and cost-effectiveness, are ideal for 400GbE and data centres. QSFP-DD offers top-of-the-line bandwidth density and the flexibility of backwards compatibility with lower-speed QSFP pluggable modules and cables, making it one of the most popular choices for high-speed data centers and networks. As a leading solution in high-speed applications, QSFP-DD. As high-speed networks continue to evolve, optical transceivers like QSFP-DD, QSFP28, QSFP56, SFP56, and SFP28 have become the core components enabling scalable and efficient connectivity across data centers and telecom environments. Below is a detailed breakdown of each module series.