A QSFP-100G-LR4-S Cisco Class 1 laser module is a high-speed transceiver designed for Cisco equipment. Here’s a breakdown of the specifications:

– QSFP: Quad Small Form-factor Pluggable, a compact, hot-swappable transceiver form factor
– 100G: Supports data transfer rates of 100 Gigabits per second
– LR4: Long Reach, 4-lane, supports distances up to 10 kilometers (6.2 miles) over single-mode fiber optic cables
– S: Indicates the module is designed for Cisco equipment
– Cisco: Specifies the module’s compatibility with Cisco networking equipment
– Class 1: Denotes the laser’s safety classification, indicating it is eye-safe and emits minimal radiation
– Laser: Specifies the module’s use of a laser as the light source for data transmission

These modules are commonly used in:

– High-speed data centers
– Large-scale networking equipment
– Fiber optic communication systems

They support 100GbE (100 Gigabit Ethernet) applications, such as:

– Data center interconnects
– High-performance computing
– Cloud computing

This module is designed to provide reliable, high-speed connectivity in Cisco environments, ensuring efficient data transfer over long distances.