Layer 2 Switching
Layer 2 switching is a networking concept that operates at the data link layer (Layer 2) of the OSI model, using MAC addresses to forward data frames within a local area network (LAN). It involves devices like Ethernet switches that make forwarding decisions based on MAC address tables, enabling efficient, high-speed communication between devices on the same network segment. This process reduces network congestion by creating dedicated collision domains and improving overall performance compared to older hub-based networks.
Developers should learn Layer 2 switching when working on network infrastructure, system administration, or cloud computing projects that require understanding of local network communication and performance optimization. It is essential for designing and troubleshooting LANs, implementing VLANs for network segmentation, and ensuring reliable data transfer in environments like data centers or office networks. Knowledge of this concept helps in configuring switches, managing network traffic, and integrating with higher-layer protocols.