Problems with the hub... What is a hub used for?

It depends on the speed of your entrance.

If it is ADSL, it is generally 1m to several m, and it is rarely higher than 10m, if so, then it is useless to change the hub switch route.

Routing is just a dial-up, and in your case, it's not necessary.

The speed of the network is calculated by the one with the lowest speed.

The others are useless when they are bigger.

No, in fact, you don't need a network speed of 10m.

This doesn't help reality. If that's the case, then there's no need to produce a 100m hub. Everybody went to change it.

This is not easy to do. I advise you not to do anything. A 10m hub is more than enough. We have 10 machines in the Internet café and share a 10m hub, which is very good.

Theoretically, it's all the same, your 10m network card, it doesn't work to change a thousand m device, optimize the network.

Tell you what a hub, router, switch is.

1.Hub: It is used to centralize all network devices (computers and other hubs, etc.) in the local area network, and distribute the network bandwidth evenly among each network device.

2.Router: Connect multiple machines in the LAN to the external network (beginners can understand it this way), and the general router is compatible with the switch function.

3.Switch: The function is basically the same as that of a hub, but it can be said to be an advanced hub, with a divided VLAN, which can also make each machine in the LAN flexibly use the total network bandwidth (theoretically, the bandwidth of each machine is the same as the total network bandwidth)...

The features of the hub are as follows:1. Each twisted pair interface is only connected to one workstation (network card) of Nianzhao, and the signal is transmitted point-to-point. Each station is connected to the hub with its own dedicated transmission medium, there is no longer only one transmission channel between each node, the signal sent back by each node is concentrated through the hub, and the hub then sends the signal to all nodes after shaping, amplification, so that the collision phenomenon no longer occurs on the upstream channel.

2. When a signal is received by a port, the hub reshapes and regenerates it and broadcasts it to each other port, sending the data packet instead of the data to the destination node.

The hub does not have the MAC address table that the switch has, so it sends data without targeting, but uses a broadcast method to send data. That is, 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.

A hub is a device that connects multiple Ethernet twisted pairs or fiber bundles under the same physical medium. The hub is the physical layer that operates in the OSI model. It can be thought of as a multi-port repeater, and if it detects a collision, it will send a blocking signal.

Hubs often come with a BNCAND Oraui adapter to connect to a legacy 10Base2 or 10Base5 network.

Because the hub will regenerate or amplify any digital signal it receives, and then submit it from all ports of the hub, this will cause a high chance of collision between signals, and the signal may also be eavesdropped, and this means that all the Qiaoyanze devices connected to the hub belong to the same collision domain name and broadcast domain name, so most of the hubs have been replaced by switches.

Hubs are mainly used for the formation of shared networks, and are the most economical solution to solve the problem of going directly from the server to the desktop.

In a switched network, the hub is directly connected to the switch and sends data from the switch port to the desktop. The hub is flexible in networking, it is located at a star node of the network, and the workstations connected to the nodes are centrally managed, so that the workstations with problems do not affect the normal operation of the entire network, and users are also free to join and exit.

Hubs work in a local area network (LAN) environment, like a network card, and are applied to the first layer of the OSI reference model, so they are also called physical layer devices. The hub uses electrical interconnection inside, and when the environment in which the LAN is maintained is a logic bus or ring structure, it is completely possible to use the hub to establish a physical star or tree network structure.

Features of the work of the hub

First of all, the hub is only a multi-port signal amplification device, when a port receives a data signal, because the signal has been attenuated in the transmission process from the source port to the hub, the hub will shape and amplify the signal, so that the attenuated signal is regenerated (restored) to the state when it was sent, and then ** to all other ports in the working state.

The second is that the hub only communicates with its uplink devices (such as upper-layer hubs, switches, or servers), and does not communicate directly with each other on the same layer, but broadcasts information to all ports through the uplink devices.

However, with the development of technology and changes in needs, many of the current hubs have been broadened in terms of functionality and are no longer affected by this working mechanism. The network of hubs is shared, and hubs can only work in half-duplex.

1. Unmanaged hubs.

The simplest hubs provide ** network connectivity via an Ethernet bus, connected in the form of stars. This is called an unmanaged hub and is only used in very small networks of up to 12 nodes. Unmanaged hubs do not have management software or protocols to provide network management capabilities, and such hubs can be passive or active, with active hubs being used more.

2. Stacked hubs.

Stacked hubs are slightly more complex hubs. The most striking feature of a stacked hub is that the 8 ** devices can be connected directly to each other. This allows you to scale your network by simply adding a hub and connecting it to an already installed hub, which is not only inexpensive but also simple.

3. Chassis hub.

A chassis hub is a modular device that can be plugged into several types of modules on its backplane circuit board. Some hubs come with redundant backplanes and power supplies. At the same time, some modules allow users to replace failed modules without having to shut down the entire hub.