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⚡ Technology·2 min·Updated Mar 9, 2026

What is Hub?

Networking Hub

Quick Answer

A hub is a basic networking device that connects multiple devices within a local area network (LAN). It allows data to be transmitted between these devices, acting as a central point for communication.

Overview

A hub is a simple device used in networking to connect different computers and devices in a local area network. When one device sends data to the hub, the hub broadcasts that data to all other connected devices, regardless of whether they are the intended recipient. This means that all devices receive the same data at the same time, which can lead to inefficiencies but is effective for small networks. Hubs operate at the physical layer of the OSI model, meaning they do not analyze or filter the data being transmitted. They simply repeat incoming signals to all ports, which can create a lot of unnecessary traffic in larger networks. For example, in a small office, a hub might connect several computers so that they can share files easily, but as the number of devices increases, a hub may not be the best choice due to its limitations. Despite being largely replaced by more advanced devices like switches, hubs still hold significance in understanding basic networking concepts. They are cost-effective and easy to set up, making them suitable for small setups or temporary networks. Understanding how a hub works lays the foundation for learning about more complex networking equipment.

Frequently Asked Questions

A hub broadcasts data to all connected devices, while a switch intelligently sends data only to the device that needs it. This makes switches more efficient and better suited for larger networks.
While hubs can still function in modern networks, they are generally not recommended due to their inefficiency and the availability of better alternatives like switches. Most networks today rely on switches for better performance.
The number of devices that can be connected to a hub depends on its design, but most hubs can connect anywhere from 4 to 48 devices. However, connecting too many devices can lead to network congestion.