The CISCO X2-10GB-LX4 module is an X2 form-factor transceiver designed to provide high-bandwidth connectivity up to 10 Gigabits per second (10Gbps) over multi-mode fiber (MMF). This module makes use of LX4 technology which allows it to operate over existing multi-mode fiber installations by utilizing Wavelength Division Multiplexing (WDM), sending multiple wavelengths of light through a single fiber optic cable. It can reach distances up to 300 meters, providing flexibility and scalability in network design and helping to protect existing fiber optic investments. With an SC duplex connector, it integrates smoothly into a wide range of Cisco switches and routers, facilitating high throughput and reliability for high-performance computing networks, enterprise cores, distribution layers, and service provider transport applications. The X2-10GB-LX4's hot-swappable capability ensures that upgrades and replacements can be conducted without network interruptions, enabling seamless and efficient network operation while maintaining the integrity of the data.