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02-hub (HUB)(02-HUB(集线器))(国外英语资料)
02-hub (HUB)(02-HUB(集线器))(国外英语资料)
Fully interpret the hub
If we often contact network, as the basis of building a LAN device hubs should not unfamiliar, but for the hubs behind various aspects of knowledge, we know how many?
The definition of a hub
HUB (HUB) belong to the infrastructure in the data communication system, the transmission medium, such as it and twisted pair is a without any support or little software hardware device management software. It is widely used in various situations. The hub works on a LAN (LAN) environment, like a network card, which is applied to the first layer of the OSI reference model and is therefore called the physical layer device. Hub internal used electrical interconnection, while maintaining a LAN environment is the logical bus or ring type structure, can use hub to create a physical star or tree network structure. In this regard, the hub ACTS as a multiport repeater. In fact, the hub is actually a kind of repeater, the difference only lies in the hub port services to provide more, so a hub is also called multi-port Repeaters.
The external panel structure of a common hub is very simple. D, for example -- the simplest base 10 ~ T EthernetHub hub Link is a rectangle, with the ac power socket and switch on the back, a AUI interface and a BNC interface, most of the positive position distribution there was a row 17 RJ - 45 interface. On the right side of the front are the LED display lights and LED status indicators for each rj-45 interface. The premium hubs are not so different from modern routers or switched routers. Especially modern double speed adaptive Ethernet hub, due to the common built-in can implement internal 10 MB/s and the 100 MB/s network segment exchange of mutual communication between modules, makes this type of hub can in to the hub for the node in the network segment, the exchange of communication between each node, sometimes people will simply switching hubs such as switches, these are made using a hub for the fir
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