Operating at the Network layer, they can handle Internet Protocol (IP) addresses and make routing decisions based on logical addressing rather than just physical addresses. These devices vary widely in port density, speed, and manageability; unmanaged switches offer plug-and-play convenience, while managed switches provide advanced features like VLAN configuration, Quality of Service (QoS), and remote monitoring through a command-line interface or web interface.
Network Switch Definition Complete Guide
Layer 3 Switching Layer 2 Switching Layer 2 switches operate at the Data Link layer of the Open Systems Interconnection (OSI) model, focusing exclusively on MAC addresses to move data. If the switch has previously learned the location of that destination, it forwards the frame only through the specific port, minimizing latency and congestion.
The result is significantly reduced latency for inter-VLAN communication, making them essential for complex enterprise environments that require segmented security and efficient traffic management. The most significant advantage is the elimination of collisions, which occur when two devices attempt to send data simultaneously on a shared medium.
Network Switch Definition Complete Guide
Layer 3 Switching Layer 3 switches, also known as multilayer switches, add routing capabilities to the traditional switching function. This allows them to route traffic between different virtual local area networks (VLANs) or subnets without needing to pass the traffic to a separate external router.
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