A network hub is a very basic networking device, using it to connect multiple computers with other networking devices. Now for your information, let me tell you that Hubs are such common network infrastructure devices which are used for LAN connectivity, whereas switches are now replacing hubs. Hubs function according to the central connection point of LAN’s.
What is Hub?
A Hub is a device that splits a network connection into multiple computers. It is like a distribution center. When a computer requests information from a single network or from a specific computer, then it sends that request to the hub via a cable.
Then the hub receives that request and transmits it to the entire network. Every computer in that network then has to know whether the data that has been broadcast is for them or not.
But right now these hubs are very less in vogue and they are being replaced by more advanced communication devices such as Switches and Routers.
This hub is basically a multi-port repeater. This hub is used to connect multiple wires which come from different branches, for example the connector which is used in star topology and it is used to connect different stations.
Hubs cannot filter data, so data packets are sent to all connected devices. In other words, then all the hosts that are connected to the hub have a collision domain one (1).
Apart from this, they also do not have their own intelligence so that they can find the best path for the data packets, so that in the end their wastage and inefficiencies also.
Types of Hub
- Passive Hub
- Active Hub
- Intelligence Hub
Passive Hubs are called those hubs which collect wiring from the nodes and power supply of Active Hub. These hubs relay signals to the network without cleaning and boosting them, and they cannot be used to extend the distance between nodes.
As its name is passive, in the same way it only broadcasts signals through the input port, while it sends them through the output port.
At the same time, it does not do anything to regenerate or process signals because it only functions like a connector in a topology to connect many wires.
These are called hubs which have their own power supply and can clean, boost and relay signals on their own in the network. It serves as both a repeater and a wiring center. They are used to extend the maximum distance between nodes.
This active hub works more than a connector, while it regenerates data bits to ensure whether the signals are strong or not. Another name for an active hub is a multiport repeater.
Along with actively participating in a network, it also behaves like an interface. It can also easily monitor data before forwarding them and sometimes it also improves signals before forwarding them to other connections.
Having such a feature, network problems can be easily troubleshooted.
An intelligent hub can very easily perform all the tasks that a passive hub and active hub perform, and together they help in effectively managing the network resources so that the performance of the network is highly efficient.
Through an intelligent hub, the actual location of the problem can be identified so that it can be eliminated from the root. It is very adaptable to different technologies and it can be used without much change in its configuration.
This intelligent hub also performs many different functions such as bridging, routing, switching and network management.
What is network hub?
A network hub is a networking device that is connected to multiple peripherals in a network and helps them to function as a single segment, while unlike a switch or router, it broadcasts data across each connection. It does not route them to a specific device.
Network hubs also have different speeds, which are called network data rate or bandwidth. Where the earlier older network hubs only provided 10 Mbps speeds, the current hubs offer speeds up to 100 Mbps.
In today’s larger networks, it is necessary that a dual speed network hub is used, and it comes in both 10 and 100 Mbps which provides connection points to computers and printers.
Therefore, before purchasing a hub, pay attention to how many devices are going to be connected with that network hub.
What are the features of Network Hub?
Do you know the maximum number of computers that can be connected to one big hub? If we talk about a USB hub, then we can connect 127 devices to it and 32 to the network hub. Let us now know what are the features of Network Hub.
It operates in half duplex mode.
It is available in 4 to 24 port sizes.
In this, the hosts are responsible if there is any collision detection and retransmission of packets.
There are mainly three types: – Active hub, passive hub and intelligent hub.
How does the hub work?
If we look in the true sense, then a network hub is more of a variable port repeater, and not just a common link for a cluster of computers. Its very common operation is that whatever information it receives, it forwards it to all the PC terminals which are attached.
The major disadvantage in this is that there is repetition of data in it, so that unnecessary data traffic is sent to the network. Therefore, the data is sent in bulk without identifying its destination.
Whereas if we compare it with switches then it works more efficiently, switches control the flow of data traffic in an organized manner. A switch is a very intelligent device. It easily identifies to whom the data should be sent.
Transferring the correct data packets to the appropriate units increases the network bandwidth. Therefore we can say that by using Switch in place of Hubs, there is no unnecessary data load in the network. From this unnecessary data flow, the same amount of information is sent to all the units whether they are needed there or not.
Hubs are used more in small networks, while Switch is used in large networks. These network hubs are devices that operate in layer one (physical layer) of the OSI model, while switches operate in layer 2 (data link layer) of the OSI model.
Often a switch and a hub are combined and used as a switching hub, and this helps to deliver the right data packets to the right place.