What is a Network Switch?

What is a Network Switch?

A switch is a fundamental networking device that connects multiple devices within a network, allowing efficient data transfer between them.
Unlike hubs, switches operate at the data link layer (Layer 2) and use MAC addresses to intelligently forward data to the correct destination.

How Does a Switch Work?
✅ MAC Address Learning – Stores device MAC addresses to optimize communication.
✅ Packet Forwarding – Sends data only to the intended device instead of broadcasting to all.
✅ Collision Prevention – Uses full-duplex communication to avoid data collisions.
✅ VLAN Support – Segments networks for improved security and efficiency.

Types of Switches:
Unmanaged Switches – Simple plug-and-play, no configuration required.
Managed Switches – Offer advanced features like VLANs, QoS, and security settings.
PoE (Power over Ethernet) Switches – Provide power and data through the same cable.
Layer 3 Switches – Perform basic routing functions for inter-VLAN communication.

Switches are the backbone of modern networks, ensuring seamless connectivity and efficient data flow.

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Source: LinkedIn

Credits: Mr. Aditya Kharade