The "28" in QSFP28 refers to the number of gigabits per second (Gb/s) that the transceiver is capable of supporting. In this case, QSFP28 stands for Quad Small Form-factor Pluggable 28 and supports data rates of up to 28 Gb/s per channel, making it suitable for high-speed data transmission in networking and telecommunications applications.        F

QSFP (Quad Small Form-factor Pluggable) and SFP (Small Form-factor Pluggable) are both types of optical transceiver modules used in networking equipment, but there are several key differences between the two:1. Size and Density: QSFP modules are larger and denser than SFP modules, meaning they can support more ports and provide higher bandwidth. QSFP modules have four transmit and receive channels

QSFP 40G SR4 stands for Quad Small Form-factor Pluggable 40 Gigabit Short Reach 4. It is a type of transceiver module used for high-speed data communication over optical fiber. It is designed for use in data center and high-performance computing environments to support high-speed networking applications.        Form factor & connectors   &

QSFP stands for "Quad Small Form-factor Pluggable." The term "quad" in QSFP refers to the four-channel capability of these transceivers, meaning they can support four separate data channels for high-speed communication. QSFP transceivers are widely used in data centers and high-performance computing environments to facilitate fast and efficient data transfer.   &

The main difference between QSFP and QSFP+ cables is the data transfer speed they support.QSFP (Quad Small Form-factor Pluggable) cables have a data transfer speed of up to 40Gbps (Gigabits per second) and are typically used for 40G Ethernet and InfiniBand applications.QSFP+ cables, on the other hand, support data transfer speeds of up to 56Gbps and are used for 40G and 56G Ethernet and InfiniBand