In computer networking, a hub acts as a central connection point within the network, allowing devices to communicate and share data. A hub operates at the physical layer of the OSI model, transmitting data signals to all connected devices.
What is a hub?
A hub is a networking device that serves as a central connection point within a local area network (LAN). Its primary function is to receive data signals from connected devices and broadcast them to all other connected devices, regardless of the intended recipient. Hubs operate at the physical layer (Layer 1) of the OSI model, focusing on raw data transmission without any data processing or intelligence.
Types of hubs
Active Hub
An active hub also known as a powered hub, it requires an external power source to operate. It amplifies and regenerates incoming signals, enabling data transmission over longer distances without signal degradation. Active hubs can support a larger number of ports, making them suitable for expanding network connectivity.
Passive Hub
A passive hub, also referred to as an unpowered hub, does not require an external power source. It simply provides a physical connection between devices without signal amplification or regeneration. Passive hubs have limited transmission distances and can support only a smaller number of ports.
Pros and Cons of Hubs
Like any networking device, hubs have their own set of advantages and disadvantages.
Pros of using a hub
Easy setup: Hubs are simple to install and require minimal configuration, making them user-friendly.
Cost-effective: Hubs are generally less expensive compared to other networking devices like switches or routers.
Broadcast communication: Hubs broadcast incoming data to all connected devices, which can be useful in certain scenarios where broadcasting is required, such as video streaming.
Cons of using a hub
Limited performance: Since hubs transmit data to all connected devices, network congestion can occur as the number of devices increases, resulting in reduced network performance.
Security limitations: Hubs lack built-in security features, making it easier for unauthorized users to intercept data transmitted through the network.
Collision domain: In a hub-based network, all devices share the same collision domain. If two devices transmit data simultaneously, a collision can occur, leading to data loss and retransmission.
How do hubs work?
Hubs operate by receiving data signals from connected devices and rebroadcasting them to all other devices. When a device sends data, the hub receives the signal and immediately broadcasts it to all other connected devices. This broadcast approach is known as "store-and-forward" transmission, where the hub doesn't perform any data filtering or processing.
What can you do with a hub?
A hub is a hardware device used to connect multiple devices to a single network. It serves as a central point of connection, enabling communication between all devices connected to it. There are several uses for a hub in a network setup, including the following:
Network Expansion: Hubs are ideal for expanding an existing network by allowing more devices to be connected. They provide an easy and cost-effective way to add multiple devices to a network without the need for additional cabling.
Data Sharing: With a hub, all connected devices can share data with each other. This is useful in situations where multiple users need access to the same set of files or data.
Simplified Management: A hub can simplify network management by centralizing the network's traffic. This allows network administrators to monitor and control all network activity from a single location.
Cost-effective Solution: A hub is generally a more cost-effective solution than a switch or a router for small-scale networks. This is because switches and routers are designed for larger networks with more complex requirements.
Low Latency: Hubs offer low latency, which is the time it takes for a signal to travel from one device to another. This makes them ideal for applications that require real-time data transfer, such as video streaming or teleconferencing.
The Purplelec CM12 USB-C Hub (7-in-1) is a prime example of a hub that can significantly enhance the capabilities of your laptop. One key benefit of the hub is its massive expansion capabilities. With 4K@30Hz HDMI, SD card connectivity, USB-A / USB-C data ports, and high-speed pass-through charging with Power Delivery, you can get way more out of your laptop's USB-C port. This enables you to easily connect to external displays, transfer data, and charge your devices all at once.
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9 in 1 Portable Single Wire Type C Dock Station |
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•Support power delivery charging
•1×4K HDMI,video output 1080P@60Hz up to 4K@30Hz
•1×TF & SD Card Reader up to 104MB/s.
•1×Gigabit Ethernet up to 10/100/1000 Mbps
•2× USB3.0 5Gbps
•2× USB2.0 480Mbps
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Another standout feature is the powerful pass-through charging, which can provide high-speed charging of up to 85W to your laptop using USB-C Power Delivery. This means you can keep your laptop charged up and ready to go even while you're using other devices via the hub.
When it comes to data transfer and management, the Purplelec CM12 USB-C Hub delivers some impressive capabilities. The USB-C and USB-A data ports provide speedy file transfer at up to 5 Gbps, which is more than enough for most purposes. And with an HDMI port that supports media display at resolutions up to 4K@30Hz, you can enjoy high-speed, high-definition media playback with ease.
