Ethernet Router principle

The router divides the local router and the long-distance router, the local router is uses for the linked network transmission medium, like optical fiber, coaxial cable, twisted pair line.

The long-distance router is uses for to connect the long-distance transmission medium, and requests the corresponding equipment, like the telephone line must match the modem, wireless must pass the wireless receiver, the transmitter. the its principle of work is as follows: (1) workstation A workstation B address 120.0.5 together with data message by data frame form transmission for router 1. (after 2) the router 1 receives workstation The data frame, takes out address 120.0.5 first from the masthead, and figures out according to the way instrument sends out workstation B the optimal path: R1->R2->R5->B; And data frame sending-out router 2. (3) the router 2 redundant router 1 work, and gives the data frame repeater the router 5. (4) the router 5 take out the destination address similarly, discovered 120.0.5 in this router connects in webpage, therefore gives directly this data frame workstation B. (5) workstation B receives workstation The data frame, a course of communications announced ends.

June 18, 2011

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