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HUB (hub) brief introduction
HUB is a multi-port transponder. When HUB is used as the central device, a certain line in the network has a fault, which does not affect the work of other lines. Therefore, HUB has been widely used in the local area network. Most of the time it is used in star and tree network topologies. It is connected to each host by RJ45 interface (also has BNC interface). HUB has many types according to different sayings.
HUB can be divided into passive HUB, active HUB, and intelligent HUB according to the input signal processing method.
Passive HUB: It is the most inferior type (the word is a little bit ^ _ ^), does not do any processing on the signal, does not extend the transmission distance of the medium, and has a certain impact on the signal. Each computer connected to this HUB can receive signals from all other computers on the same HUB;
Active HUB: The difference between active HUB and passive HUB is that it can amplify or regenerate the signal, so that it extends the effective transmission distance between the two hosts;
Smart HUB: Upon hearing this word, I know that this guy must be stronger than those two! In addition to all the functions of the active HUB, the intelligent HUB also has network management and routing functions. In the intelligent HUB network, not every machine can receive the signal, only the port computer with the same address as the signal destination address can receive it. Some smart HUBs can choose the best path by themselves, which has a good management of the network.
There are many other types according to other methods, such as 10M, 100M, 10 / 100M adaptive HUB, etc., which will not be introduced here one by one. In short, the current market price is less expensive, try to buy a little better.
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