What Is a Layer 3 Switch?
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A layer 3 switch is a specialized type of network switch that can route packets between multiple IP subnets. It is designed for use in a multilayer network infrastructure, where both switching and routing functions are needed. Layer 3 switches are used to establish communication between different network segments, providing the same functionality as routers but with improved performance and lower latency. Most layer 3 switches also have security features such as policy based access control, firewall capabilities, and quality of service filtering.