"Hub"
is the meaning of the "center" hub (HUB) is a computer network to connect
multiple computers or other devices connected devices, is the smallest unit on
the network, centralized management. Hub
(HUB) is basically a shared device, and its essence is a repeater, mainly to
provide signal amplification and transit, it is a port to receive all the
signals are distributed to all ports out.
Hub The main function of the received signal, renewable plastic surgery to enlarge, to expand the transmission distance of the network, all nodes are concentrated in the center node. It works on the first layer of the OSI (Open Systems Interconnection Reference Model) reference model, namely, "physical layer". Hub and network card, cable and other transmission media, belong to the LAN infrastructure, using the CSMA / CD (a detection protocol) access method.
Hub (HUB) is a data communication system infrastructure, and twisted pair transmission medium, it is a do not need any software support or minimal management software to manage hardware devices. It is widely applied to various occasions. Hubs work in a local area network (LAN) environment, like a card used in the first layer of the OSI Reference Model, also known as the physical layer device. The hub uses within the electrical interconnection, and maintenance of the LAN environment is a logical bus or ring structure, able to use the hub to establish a physical star or tree network structure. In this regard, the role played by the hub is equivalent to the multi-port repeater. In fact, a kind of hub is actually a repeater, the difference only lies in the hub to provide port services hub known as the mouth following device.
According to the IEEE 802.3 protocol, the hub function is selected randomly from a port of the device, and make it exclusive to the full bandwidth of the hub on the associated equipment (switches, routers or servers, etc.) to communicate. It can be seen, the hub at work with the following two characteristics.
First Hub just over one-port signal amplification equipment, work when a port receives data signals, the signal attenuation in the transfer process from the source port to the Hub has, so Hub will be the signal shaping to enlarge attenuation of signal regeneration (recovery) to send the state, and immediately forwarded to all other ports in working condition. It can be seen from the Hub works in the network, it has only a signal amplification and retransmission role, its purpose is to extend the transmission range of the network, not with the signal directional transmission capacity, shared equipment - standard. Therefore, known as a hub for the "silly Hub" or "dumb Hub".
Followed by the Hub and its associated equipment (such as the upper the Hub, switch or server) communication between the various ports of the same layer do not communicate directly, but by then passes the information on the associated equipment to broadcast to all ports. Thus, even in the same Hub different between the two ports to communicate, must go through two steps: The first step is to upload the information on the associated equipment; the second step this information on the associated equipment broadcast to all ports.
Hub The main function of the received signal, renewable plastic surgery to enlarge, to expand the transmission distance of the network, all nodes are concentrated in the center node. It works on the first layer of the OSI (Open Systems Interconnection Reference Model) reference model, namely, "physical layer". Hub and network card, cable and other transmission media, belong to the LAN infrastructure, using the CSMA / CD (a detection protocol) access method.
Hub (HUB) is a data communication system infrastructure, and twisted pair transmission medium, it is a do not need any software support or minimal management software to manage hardware devices. It is widely applied to various occasions. Hubs work in a local area network (LAN) environment, like a card used in the first layer of the OSI Reference Model, also known as the physical layer device. The hub uses within the electrical interconnection, and maintenance of the LAN environment is a logical bus or ring structure, able to use the hub to establish a physical star or tree network structure. In this regard, the role played by the hub is equivalent to the multi-port repeater. In fact, a kind of hub is actually a repeater, the difference only lies in the hub to provide port services hub known as the mouth following device.
According to the IEEE 802.3 protocol, the hub function is selected randomly from a port of the device, and make it exclusive to the full bandwidth of the hub on the associated equipment (switches, routers or servers, etc.) to communicate. It can be seen, the hub at work with the following two characteristics.
First Hub just over one-port signal amplification equipment, work when a port receives data signals, the signal attenuation in the transfer process from the source port to the Hub has, so Hub will be the signal shaping to enlarge attenuation of signal regeneration (recovery) to send the state, and immediately forwarded to all other ports in working condition. It can be seen from the Hub works in the network, it has only a signal amplification and retransmission role, its purpose is to extend the transmission range of the network, not with the signal directional transmission capacity, shared equipment - standard. Therefore, known as a hub for the "silly Hub" or "dumb Hub".
Followed by the Hub and its associated equipment (such as the upper the Hub, switch or server) communication between the various ports of the same layer do not communicate directly, but by then passes the information on the associated equipment to broadcast to all ports. Thus, even in the same Hub different between the two ports to communicate, must go through two steps: The first step is to upload the information on the associated equipment; the second step this information on the associated equipment broadcast to all ports.
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