Network Switch
A network switch is a hardware device that connects devices on a computer network by using packet switching to receive, process, and forward data to the destination device. It operates at the data link layer (Layer 2) of the OSI model, though some advanced switches can also function at the network layer (Layer 3). Switches are essential for creating local area networks (LANs) and managing traffic efficiently by directing data only to the intended recipient.
Developers should learn about network switches when working with on-premises infrastructure, data centers, or any environment requiring reliable and high-performance local networking. Understanding switches is crucial for troubleshooting connectivity issues, optimizing network performance, and designing scalable systems, especially in DevOps, cloud engineering, or roles involving system administration. Use cases include setting up office networks, managing server clusters, and ensuring low-latency communication in applications like gaming or financial trading platforms.