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交换机和HUB 的区别(The difference between a switch and a HUB).doc

发布:2017-07-18约9.02千字共8页下载文档
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交换机和HUB 的区别(The difference between a switch and a HUB) There is a difference between Switch and Hub, such as a 100M Switch, which is 100 megabytes per connection to the Switch, while the Hub is the 100M The source. And Hub is communicating via radio, which is very much a network resource. In short, the hub does not have routing algorithms, he is a simple collision communication, and like the switch department, she has her own address table. For example, an eight-port hub, on port 1 The machine will send data to the machine on port 8, and the data runs like this: first she listens on port 1 for the data on the hub to be transmitted, if not, at the end Mouth 1 jumps out to the hub and shouts: I have a packet to give port 8, please port 8 hear back this data is sent to the hub of the remaining 7 on the radio Each port will receive such a packet, and then port 2 - port 7 will send a message to the fracture 1: I am not port 8, please release the bandwidth quickly At the same time port 8 will send a message to the fracture 1: I am port 8, are you looking for me? Port 1 is confirmed with port 8 after receiving the above message, and then They set up transmission links to complete data forwarding. Wait for port 1 to send the message looking for the broken 8, then she will send this message straight To receive the answer to port 8. After ports 1 and 8 complete data forwarding, assuming they have to communicate, the above process will also be repeated on the hub. Thus it can be seen The hubs way of communication is a bit of a collision, a data that needs to be delivered to all ports, which not only increases the time of the data forwarding, but also the hub tends to give the network A terrible broadcast storm. And the same work reswitches dont have to be so cumbersome, assuming that port 1 and port 8 have never been communicated before, so they start at the beginning As with the hub, port 1 looks for port 8 on the switch, and once port 8 returns confirmation, then port 1 gene
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