Access control on a LAN
If multiple terminals send the data on the LAN without asking, the datacollisions will occur frequently and the data cannot be sent accurately.Therefore, the access control is required. I will introduce three of them.(1)TDMATDMA (Time Division Multiple Access) is adopted in the star topology.This method divides the usage time of the transmission channel andallocates it to each terminal in order.(2)CSMA/CDCSMA/CD is adopted in the bus topology. It monitors the communicationstatus on the transmission channel and sends the data when thetransmission channel becomes available. If multiple terminals transmit dataat the same time, data collisions will occur on the transmission channel, soeach termi
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