Switches

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Network switches are devices that connect multiple devices within a local area network (LAN) and enable them to communicate efficiently. They operate primarily at Layer 2 of the OSI model (Data Link Layer), using MAC addresses to forward data only to the intended recipient, which improves performance and security compared to broadcasting data to all devices. Some switches also operate at Layer 3 (Network Layer), enabling basic routing between different VLANs or subnets. Switches are essential for directing traffic, managing bandwidth, and maintaining organized, high-speed internal networks in homes, businesses, and data centers.