Thank you for your answer. I understand how full duplex and half duplex works but my concern is with Twisted pair we have 2 seperate pairs of cables 1 for sending and 1 for recieving. Even if we are operating in half duplex mode the nodes are not going to send the data on the same wire. So if the wires are different where is the chance of collison. I was reading a bit in this book today Ethernet - The Definitive Guide. page 226 A twisted-pair transceiver, for example, detects a collision by the simultaneous occurrence of a signal on both the transmit and receive wire pairs. An excessive amount of signal crosstalk can result in the generation of spurious or What i understand from the statement is that the collision is not detected on the wire but insted colission is, getting a signal on both the sender and reviever cable at the same time. phantom collisions being detected on the twisted-pair segment
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Hi karsten, Thanks a lot for the quick response. I understand with the switched based networks we have full duplex and this problem does not occuer any more. I was just trying to understand the concept. I always thought that the collision was a problem with the coaxial cables, because the same cable was used to send and recieve the data and collison on the wire is understandable in that case. But when we have seperate cabled how will the data colloid. From your answer i understand that the layer 2 software is not sure if the underlying is a coaxial or a twisted pair hence if the sender recieves a data within the collision windows it assumes that the data has colloided. It just seems to be a bit of grey area hence the confusion.
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