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Xiaobian to share with you what the role of the hub in the computer, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's learn about it!

A hub is a device that connects multiple Ethernet twisted pairs or optical fibers under the same physical medium. its function is to regenerate, shape and amplify the received signals in order to expand the transmission distance of the network. at the same time, all nodes are concentrated on the nodes centered on it.

A hub (Hub) is a device that connects multiple Ethernet twisted pairs or optical fiber sets under the same physical medium. A hub is the physical layer that operates in the OSI model. It can be seen as a multi-port repeater, and if it detects a collision, it will submit a blocking signal.

The main function of the hub is to regenerate and amplify the received signal in order to expand the transmission distance of the network and concentrate all nodes on the nodes centered on it. It works in the first layer of the reference model of OSI (Open Systems Interconnection reference Model), that is, the physical layer. Like network cards, network cables and other transmission media, hubs belong to the basic equipment in the local area network, which adopts CSMA/CD (carrier sensing multiple access technology with collision detection) media access control mechanism. Each interface of the hub simply sends and receives bits. When it receives 1, it forwards 1, and when it receives 0, it forwards 0. There is no collision detection.

The hub (hub) belongs to the hardware network underlying equipment, basically does not have the "intelligent memory" ability and "learning" ability similar to the switch. It also does not have the MAC address table that the switch has, so it sends data without pertinence, but by broadcast. In other words, when it wants to send data to a node, it does not send the data directly to the destination node, but sends the packet to all nodes connected to the hub, as shown in the figure, simple and clear.

HUB is a multi-port transponder. When taking HUB as the central device, a line in the network has a fault, which does not affect the work of other lines. So HUB has been widely used in local area network. Most of the time it is used in star and tree network topologies, connecting to hosts with RJ45 interfaces (there are also BNC interfaces). There are many kinds of HUB according to different terms.

These are all the contents of the article "what are the functions of hubs in computers?" Thank you for your reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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