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28-04-2007, 14:47

The run length of cable isn't the limiting factor as far as I remember. Its all to do with the size of a packet and the time it takes to travel to the furthest most point on the network without going through a switch or router. The NIC uses collision detection to see if there is any data on the network before transmitting. In order for a sending PC to detect that its packet has been transmitted correctly, the furthest most point on the network must have started to recieve the start of the packet before the sending point has finished sending. A switch or router buffers data so networks can be extended further outwards, but I think 200m is approx the distance for an MTU of 1500.
I've not explained that very well. Someone else want to try and word it better?

28-04-2007, 14:47	#4
Creative Guest Posts: n/a	Re: Rj45 The run length of cable isn't the limiting factor as far as I remember. Its all to do with the size of a packet and the time it takes to travel to the furthest most point on the network without going through a switch or router. The NIC uses collision detection to see if there is any data on the network before transmitting. In order for a sending PC to detect that its packet has been transmitted correctly, the furthest most point on the network must have started to recieve the start of the packet before the sending point has finished sending. A switch or router buffers data so networks can be extended further outwards, but I think 200m is approx the distance for an MTU of 1500. I've not explained that very well. Someone else want to try and word it better?